COP30 UNFCCC Climate Summit in Brazil
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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BEFORE: Rainforest conservation relied on unpredictable donor grants and complex carbon credit markets. NOW: The Tropical Forest Forever Facility (TFFF) functions as a blended-finance investment vehicle aiming for $125 billion, paying out capital market dividends directly to forested nations, with a mandate that 20% goes to Indigenous Peoples and local communities.
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BEFORE: The timeline and targets for scaling adaptation finance for vulnerable nations were highly contested. NOW: The Belém Package establishes a formal, albeit delayed, commitment to triple global adaptation finance by 2035.
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BEFORE: 'Just Transition' was a broad, legally vague concept lacking an operational platform. NOW: The Belém Action Mechanism (BAM) for Just Transition was established as an institutional framework to mandate rights-based protections for workers and communities affected by the shift away from fossil fuels.
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BEFORE: Assessing global adaptation efforts lacked standardized metrics, leading to fragmented reporting. NOW: COP30 finalized 59 voluntary, cross-sector indicators to track progress under the Global Goal on Adaptation Framework.
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BEFORE: Climate negotiations treated global health impacts as a peripheral side-issue. NOW: COP30 launched the Belém Health Action Plan, backed by $300 million from philanthropic organizations, to systematically address climate-driven health threats.
What Did NOT Change
Despite fierce advocacy from island nations and civil society for a binding treaty to end fossil fuel extraction, major petrostates once again blocked any mandatory phase-out language. The summit only managed to produce a voluntary 'Transitioning Away From Fossil Fuels Roadmap,' leaving the actual timeline for global fossil fuel eradication non-binding and dependent on individual state action.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ COP30 secured a binding international treaty to immediately phase out all fossil fuels.
✓ COP30 only produced a voluntary 'Transitioning Away From Fossil Fuels Roadmap', as explicit binding commitments were blocked by major oil-producing nations.
Headlines often highlight the consensus around 'transitioning away' from fossil fuels, misleading readers into believing these are legally enforceable phase-out mandates.
✗ The Tropical Forest Forever Facility (TFFF) is a traditional charity fund built entirely on direct donations from wealthy countries.
✓ The TFFF is a blended-finance mechanism designed like a sovereign wealth fund. It invests its $125 billion target capital in global markets and uses the generated profits to pay countries for conservation.
Earlier UN climate mechanisms, like the Green Climate Fund, operated primarily on direct donor grants, leading people to assume the TFFF functions identically.
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the outcomes of the COP30 Summit in Belém: 1. The Tropical Forest Forever Facility (TFFF) mandates that at least 20% of its conservation payments go directly to Indigenous Peoples and local communities. 2. The Belém Package includes a commitment to triple global adaptation finance by the year 2030. 3. The Belém Action Mechanism (BAM) was established to track and regulate international carbon market trading under Article 6 of the Paris Agreement. How many of the above statements are correct?
Q2
Match the FollowingMatch the specific initiatives/frameworks from COP30 (List I) with their primary descriptions (List II): List I: A. Mutirão text B. Belém Action Mechanism (BAM) C. Tropical Forest Forever Facility (TFFF) D. Global Goal on Adaptation Framework List II: 1. Blended-finance vehicle for rewarding standing rainforest conservation 2. Tracked using 59 voluntary, cross-sector indicators 3. The overarching consensus agreement bundling major negotiation tracks 4. Institutional platform for rights-based, people-centered economic shifts Select the correct code:
Q3
Assertion & ReasonAssertion (A): The Tropical Forest Forever Facility (TFFF) marks a structural departure from traditional grant-based conservation funding models. Reason (R): The TFFF is designed to use profits generated from capital market investments to provide flat, results-based payments to nations that maintain their forest cover. Select the correct answer from the codes given below:
Release of Climate Change Performance Index 2025
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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India's Global Rank: BEFORE (CCPI 2024), India was ranked 7th globally. NOW (CCPI 2025), India has dropped three places to rank 10th.
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Top Performing G20 Nations: BEFORE (CCPI 2024), India, Germany, and the EU were the high-performing G20 members. NOW (CCPI 2025), only India and the UK are the G20 countries in the high-performing category.
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India's Renewable Energy Rating: BEFORE (CCPI 2024), India managed a moderate/medium rating in the Renewable Energy category. NOW (CCPI 2025), India received a 'low' rating in the Renewable Energy category, contributing to its drop in the overall ranking.
Prelims Angle
NCERT Connection
Practice Questions
Q1
Correct Statement(s)Consider the following statements regarding the Climate Change Performance Index (CCPI) 2025: 1. The top three positions were left vacant because no country achieved a 'very high' performance rating. 2. India and the United Kingdom are the only G20 countries ranked among the high climate performers. Which of the statements given above is/are correct?
150th Birth Anniversary of Sardar Patel
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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BEFORE: Previous anniversaries involved standard annual tributes and regional 'Run for Unity' marathons. NOW: The 150th milestone escalated the tribute with the launch of the nationwide 'Sardar@150 Unity March' and grand-scale military and cultural parades at Ekta Nagar.
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BEFORE: Commemorative numismatic and philatelic releases for Patel were limited to past milestones (like his centenary). NOW: The government released a specific ₹150 commemorative coin and a dedicated 150-year postal stamp to mark this exact milestone.
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BEFORE: Historically (prior to Patel's intervention), the Indian subcontinent was politically fractured into British provinces and hundreds of independent princely states. NOW: The legacy celebrated during this anniversary represents a singular, cohesive Republic bound by one Constitution.
Prelims Angle
NCERT Connection
Practice Questions
Q1
Correct Statement(s)Which of the following statements regarding the integration of princely states and Sardar Vallabhbhai Patel is/are correct? 1. Sardar Patel initiated 'Operation Polo' to successfully integrate the princely state of Junagadh into the Indian Union. 2. The 'Instrument of Accession' was the standard legal document executed by princely states to accede to the Dominion of India.
Global Forest Resources Assessment 2025 Released
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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Total Forest Area Ranking: India moved from the 10th position in GFRA 2020 to the 9th position in GFRA 2025, now accounting for roughly 2% of the global forest area (approximately 72.7 million hectares).
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Global Deforestation Rate Decline: The net annual rate of global forest loss significantly dropped from 10.7 million hectares (1990-2000 period) to 4.12 million hectares in the 2015-2025 assessment period.
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Carbon Sink Standing: India was officially recognized as the 5th largest global carbon sink, removing roughly 150 million tonnes of CO2 equivalent annually during the 2021-2025 period.
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Natural Regeneration Recognition: GFRA 2025 established that over 90% of the world's forests are now regenerating naturally, marking a structural shift in global forestry composition reporting away from purely plantation-driven recovery.
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Asian Carbon Removal Surge: Led by India and China, the Asian continent's forest carbon removals sharply increased to 0.9 billion tonnes of CO2 annually, reflecting drastically reduced regional emissions from deforestation.
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Protected Area Coverage: The report noted an increase in legally protected forests, which now cover one-fifth (around 813 million hectares) of the world's total forest area.
What Did NOT Change
India retained its 3rd position globally in terms of average annual net forest area gain, an achievement it also held in the previous 2020 assessment. Furthermore, despite robust achievements in forest expansion, India's updated Nationally Determined Contribution (NDC) under the Paris Agreement kept its forestry target unchanged at creating an additional carbon sink of 2.5 to 3 billion tonnes of CO2 equivalent by 2030.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ Global deforestation rates are accelerating year-on-year.
✓ According to GFRA 2025, the annual rate of global net forest loss actually fell from 10.7 million hectares in the 1990s to 4.12 million hectares between 2015 and 2025.
Localized spikes in severe deforestation, such as wildfires in the Amazon or logging in the Congo basin, receive high media coverage, heavily overshadowing the global net statistical deceleration.
✗ The GFRA only measures pristine, natural forests to calculate its rankings.
✓ The FAO defines a 'forest' as land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10%, which explicitly includes plantations and agroforestry.
People equate 'forests' strictly with notified wildlife reserves and dense natural jungles. India's ranking heavily benefits from its massive commercial plantations, agroforestry, and bamboo cultivation (amounting to 11.8 million hectares).
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the Global Forest Resources Assessment (GFRA) 2025: 1. It is published annually by the United Nations Environment Programme (UNEP). 2. India ranks 3rd globally in terms of total forest area. 3. According to the report, the global annual rate of net forest loss has increased significantly in the 2015-2025 period compared to the 1990s. How many of the above statements are correct?
Q2
Match the FollowingMatch List I (India's Performance Indicator in GFRA 2025 / Climate Targets) with List II (Rank / Value): List I: A. Rank in total forest area globally B. Rank in average annual net forest area gain C. Rank among top global carbon sinks D. Additional carbon sink target under India's NDC by 2030 List II: 1. 3rd 2. 5th 3. 9th 4. 2.5 to 3 billion tonnes of CO2 equivalent Select the correct code:
Q3
Assertion & ReasonAssertion (A): India's ranking in total global forest area improved to the 9th position in the GFRA 2025 report. Reason (R): Under its updated 2022 Nationally Determined Contributions (NDCs), India officially increased its 2030 carbon sink target from 3 billion tonnes to 5 billion tonnes of CO2 equivalent. Select the correct answer:
NITI Aayog Launches Three Circular Economy Reports
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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Vehicle Scrapping Infrastructure: BEFORE - Heavy reliance on informal scrappers with a severe lack of testing capacity. NOW - A proposed target of 'One ATS per district' and the establishment of PSU-led Registered Vehicle Scrapping Facilities (RVSFs), directly integrated with VAHAN and Parivahan portals.
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Tyre Downcycling Regulations: BEFORE - Widespread, unregulated downcycling of waste tyres into poor-quality, highly polluting Tyre Pyrolysis Oil (TPO). NOW - Mandated restriction of TPO usage exclusively to refineries or approved industrial applications, forcing the conversion of carbon char into high-value recovered Carbon Black (rCB).
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Battery Chemical Traceability: BEFORE - Insufficient safety and quality tracking for second-life or recycled lithium-ion batteries. NOW - A strategic recommendation to update BIS Standard IS 16046 to explicitly mandate chemical composition testing for recycled batteries.
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Critical Mineral Sourcing: BEFORE - Overwhelming dependence on foreign imports for Lithium, Cobalt, and Nickel with disjointed domestic recovery. NOW - 'Urban Mining' is formalized as a strategic alternative to mineral imports, backed by recommendations for additional incentives under the PLI Scheme for manufacturers utilizing recycled materials.
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Informal Sector Integration: BEFORE - Informal waste pickers and dismantlers operated largely outside the Extended Producer Responsibility (EPR) legal framework, facing punitive liabilities. NOW - Formal integration via the Udyam Assist platform, offering one-time liability waivers, rationalized GST/HSN codes, and Recognition of Prior Learning (RPL) certification.
What Did NOT Change
Despite the massive push to formalize the recycling ecosystem, the fundamental liability structure of Extended Producer Responsibility (EPR) remains unaltered; Producers, Importers, and Brand Owners (PIBOs) are still legally and financially accountable for the end-of-life management of their products. Furthermore, Construction and Demolition (C&D) waste was conspicuously left out of these specific thematic reports, leaving a major segment of urban waste outside this newly proposed circular policy framework.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ Extended Producer Responsibility (EPR) places the financial and physical burden of waste management entirely on the end consumer.
✓ EPR legally mandates that the manufacturer, importer, or brand owner (PIBO) is financially and physically responsible for the environmentally sound management of their products at the end of their life.
Consumers often see 'recycling fees' or disposal costs passed down to them at the point of sale, leading them to falsely believe the legal burden rests on the buyer rather than the producer.
✗ Vehicle scrapping under the formal policy completely destroys the vehicle, simply creating massive heaps of useless scrap metal.
✓ Formal scrapping is a highly systematic resource-recovery process; NITI Aayog projects that scrapping older models (2005-2023) can recover roughly 98 million tonnes of reusable steel, reducing the need for virgin iron ore mining.
The colloquial term 'scrapping' implies sheer destruction and waste generation, obscuring the high-yield 'circular' extraction of steel, aluminum, and copper mandated in Registered Vehicle Scrapping Facilities (RVSFs).
✗ Any form of tyre recycling is environmentally friendly and beneficial for the circular economy.
✓ Informal 'downcycling' of tyres into Tyre Pyrolysis Oil (TPO) causes severe carcinogenic air pollution; true circularity requires converting tyres into high-value recovered Carbon Black (rCB).
People mistakenly assume that because a waste product is being processed (pyrolysis), it is eco-friendly, ignoring the devastating emissions caused by unregulated thermal degradation.
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the circular economy framework and recent NITI Aayog reports released in January 2026: 1. The reports mandate the integration of Construction and Demolition (C&D) waste into the Extended Producer Responsibility (EPR) portal. 2. Under the proposed Tyre Waste guidelines, the usage of Tyre Pyrolysis Oil (TPO) is heavily restricted to prevent polluting downcycling. 3. The National Critical Mineral Mission (NCMM) incentivizes 'urban mining' to recover critical minerals like lithium and nickel from spent batteries. How many of the above statements are correct?
Q2
Match the FollowingMatch the policy mechanisms/terms (List I) with their corresponding sectors or purposes (List II) in the context of India's circular economy: List I: A. RVSFs B. Recovered Carbon Black (rCB) C. Urban Mining D. BIS Standard IS 16046 List II: 1. Chemical composition testing for batteries 2. Extraction of critical minerals from E-waste 3. High-value upcycling of Waste Tyres 4. Systematic dismantling of End-of-Life Vehicles
Q3
Assertion & ReasonAssertion (A): The 2026 NITI Aayog reports on the circular economy heavily emphasize 'Urban Mining' as a strategic policy alternative to traditional mineral extraction. Reason (R): India possesses vast, easily accessible domestic geological reserves of Lithium and Cobalt but currently lacks the advanced extraction technology required to mine them economically.
Indian Ports Bill 2025 Introduced
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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Maritime State Development Council (MSDC): BEFORE, there was no statutory body coordinating port policies between the Centre and States. NOW, the MSDC gets statutory recognition. Chaired by the Union Ports Minister, it drafts a National Perspective Plan and ensures cooperative federalism.
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State Maritime Boards (SMBs): BEFORE, non-major ports were managed via ad-hoc state regulations without uniform national recognition. NOW, the Act provides statutory backing to SMBs, explicitly empowering them to plan infrastructure, grant licenses, and fix tariffs for non-major ports.
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Dispute Resolution Committees (DRCs): BEFORE, disputes involving non-major ports, concessionaires, and users languished in civil courts. NOW, State Governments are mandated to constitute DRCs that must adjudicate disputes within six months, with appeals going straight to the High Court.
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Environmental Compliance: BEFORE, the 1908 Act simply prohibited discharging 'rubbish' or ballast into ports. NOW, ports must legally comply with international treaties like the MARPOL Convention and the Ballast Water Management Convention, and prepare mandatory port waste reception plans.
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Penalties and Safety: BEFORE, penalties for endangering port safety were outdated and insignificant. NOW, the Act criminalises specific offences—such as disturbing waterbed or geophysical structures without permission—with imprisonment up to six months or a fine up to one lakh rupees.
What Did NOT Change
Despite the comprehensive overhaul, the fundamental Constitutional division of administrative powers remains completely intact. Major ports continue to be exclusively regulated by the Central Government under the Union List, governed separately by the Major Port Authorities Act, 2021. The new legislation also retains the traditional powers of the port conservator to issue directions regarding vessel anchoring, berthing, and the removal of obstructions within port limits.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ All ports in India, regardless of size, are administered directly by the Central Government.
✓ Only the 12 Major Ports fall under Entry 27 of the Union List and are managed by the Centre. The 200+ non-major ports fall under Entry 31 of the Concurrent List and are administered by respective State Maritime Boards.
Because Parliament passed a unified 'Indian Ports Bill' covering the whole country, laypersons assume it centralizes control over all ports.
✗ The newly statutory Maritime State Development Council (MSDC) will now fix tariffs for all ports across India.
✓ Tariffs for non-major ports are fixed by the State Maritime Boards or authorized concessionaires. The MSDC acts as a consultative body that issues guidelines on tariff transparency and formulates a National Perspective Plan.
The MSDC's mandate to ensure transparency and national integration is often mistaken for direct regulatory or tariff-setting authority over state domains.
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the Indian Ports Act, 2025: 1. It mandates the establishment of Dispute Resolution Committees by the Central Government to adjudicate disputes across all major and non-major ports. 2. It provides statutory backing to the Maritime State Development Council (MSDC), which is chaired by the Prime Minister of India. 3. It legally mandates compliance with the International Convention for the Prevention of Pollution from Ships (MARPOL). How many of the above statements are correct?
Q2
Match the FollowingMatch the following Constitutional Entries and Bodies with their respective jurisdictions related to port administration in India: List I (Subject) 1. Entry 27, Union List 2. Entry 31, Concurrent List 3. Maritime State Development Council 4. Dispute Resolution Committees (DRC) List II (Jurisdiction/Function) A. Adjudicates disputes for non-major ports B. Administration of Minor/Non-Major Ports C. Administration of Major Ports D. Formulates the National Perspective Plan for all ports Select the correct code:
Q3
Assertion & ReasonAssertion (A): The Indian Ports Act, 2025 empowers State Maritime Boards to administer and fix tariffs for non-major ports without violating the Constitutional division of powers. Reason (R): Ports other than major ports are listed under Entry 31 of the Concurrent List, allowing the Parliament to pass a unifying framework law while statutorily delegating on-ground regulatory powers to State-level boards. Select the correct answer:
Lok Sabha Passes Finance Bill 2026
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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Taxation of Share Buybacks: Originally, the budget proposed heavily taxing all promoter buybacks. The amendment restricted the additional promoter tax solely to domestic buybacks governed by Section 68 of the Companies Act, 2013, exempting offshore entities and cross-border capital returns.
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Start-up Tax Holiday: The turnover threshold under Section 140 of the new Income-tax Act, 2025, was tripled from ₹100 crore to ₹300 crore, aligning with the February 2026 DPIIT notification for deep-tech start-ups.
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Reassessment Proceedings: A statutory minimum period of 30 days was prescribed for an assessee to furnish a return of income in response to a reassessment notice issued under Section 148.
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Decriminalisation of Recovery: The power of the Tax Recovery Officer (TRO) to arrest a taxpayer-in-default and detain them in prison was completely removed, shifting towards non-coercive recovery methods.
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Offshore Banking Units (OBUs): The tax holiday for OBUs in Special Economic Zones was extended from 10 to 20 consecutive years, clarifying that units whose original 10-year holiday expired in March 2025 will receive the extended benefit starting FY 2026-27.
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Statutory Transition: The shift to the Income-tax Act, 2025, was formalized for FY 2026-27, condensing the tax code into 536 sections across 23 chapters.
What Did NOT Change
The foundational personal income tax slabs and the ₹12 lakh annual basic exemption limit proposed in the February 1 Budget remained entirely unchanged. Additionally, the flat 12% surcharge on the buyback-related additional tax for domestic promoters was retained despite significant industry lobbying for its removal.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ The Union Budget process is complete as soon as the Finance Minister presents it in February.
✓ The budget is only a proposal until the Appropriation Bill (for spending) and the Finance Bill (for taxation) are passed by Parliament and receive Presidential assent.
Media coverage peaks on Budget Day (February 1), making it seem like a finalized event rather than the initiation of a two-month legislative process.
✗ The President can send the Finance Bill back to the Lok Sabha for reconsideration if they disagree with the tax rates.
✓ The Finance Bill is categorized as a Money Bill. Under Article 111 of the Constitution, the President cannot return a Money Bill to Parliament for reconsideration.
The President has suspensive veto power for Ordinary Bills, leading to the false assumption that this veto power uniformly applies to all legislation.
✗ The Income Tax Act 1961 is completely abolished and has no legal standing after April 1, 2026.
✓ While the Income-tax Act 2025 takes over for FY 2026-27 onwards, Section 536 of the new Act ensures continuity. Pending litigation, appeals, and assessments from before April 2026 will still be governed by the 1961 Act.
People often assume new laws retroactively erase old statutes, ignoring standard 'savings and repeal' transitional provisions in jurisprudence.
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the Finance Bill 2026 and the transition to the Income Tax Act 2025: 1. The Income Tax Act 2025 completely repeals the 1961 Act without transitional provisions, meaning all pending assessments from FY 2024-25 will be immediately evaluated under the 2025 Act. 2. The Finance Bill 2026 decriminalized tax recovery by stripping the Tax Recovery Officer (TRO) of the power to arrest and detain a taxpayer-in-default. 3. The start-up tax holiday turnover limit was increased to ₹300 crore to align with the revised Department for Promotion of Industry and Internal Trade (DPIIT) guidelines. How many of the above statements are correct?
Q2
Match the FollowingMatch the legislative and tax changes introduced via the Finance Bill 2026 (List I) with their corresponding specifics (List II): List I: A. Additional Promoter Tax on Share Buybacks B. Reassessment Notice under Section 148 C. Offshore Banking Units (OBUs) Tax Holiday D. Structure of the Income Tax Act 2025 List II: 1. Reduced to exactly 536 Sections 2. Restricted strictly to Section 68 of the Companies Act, 2013 3. Mandates a minimum of 30 days to furnish a return 4. Extended to a total of 20 consecutive years Select the correct code:
Q3
Assertion & ReasonAssertion (A): During the enactment of the Finance Bill 2026, the government restricted the newly introduced additional tax on promoter share buybacks strictly to buybacks undertaken under Section 68 of the Companies Act, 2013. Reason (R): The government intended to explicitly exempt offshore entities and cross-border capital return structures from the higher tax net to prevent an unintended flight of foreign capital. Select the correct answer:
ISRO Space Docking Experiment (SpaDeX) Success
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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BEFORE: ISRO satellites operated completely independently, lacking the ability to physically connect or share resources once in orbit. NOW: ISRO spacecraft can rendezvous autonomously, mechanically link, and transfer power and control data seamlessly in orbit.
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BEFORE: India relied entirely on the payload capacity of a single launch vehicle to send mass into deep space. NOW: With docking capabilities, ISRO can launch heavy mission components across multiple rockets and assemble them in orbit, a necessity for Chandrayaan-4.
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BEFORE: Only the US, Russia, and China possessed operational orbital docking technologies. NOW: India joins this elite group by successfully demonstrating its indigenous 'Bharatiya Docking System' with autonomous built-in intelligence.
Prelims Angle
NCERT Connection
Practice Questions
Q1
With Reference ToWith reference to ISRO's Space Docking Experiment (SpaDeX), consider the following statements: 1. It made India the third country in the world to demonstrate autonomous space docking capabilities. 2. The mission involved docking the Chaser and Target satellites, which were launched aboard a GSLV rocket. 3. The demonstrated technology is a critical prerequisite for the upcoming Chandrayaan-4 sample-return mission. Which of the statements given above is/are correct?
ISRO Launches NASA-ISRO Synthetic Aperture Radar (NISAR)
In News
What Happened
Why It Matters
Background
History & Context
What Changed
- ▶
BEFORE: Earth-observing radar satellites typically carried only a single radar frequency (either C, L, or S-band), limiting their analytical depth. NOW: NISAR operates the world's first dual-frequency radar, combining NASA's 24-cm L-band (which penetrates deep vegetation) with ISRO's 12-cm S-band (which captures fine surface and urban infrastructure details).
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BEFORE: High-resolution radar satellites often suffered from narrow coverage swaths, meaning it took weeks or months to map the globe. NOW: Utilizing advanced SweepSAR technology, NISAR achieves a wide 242 km imaging swath, enabling a complete mapping of Earth's land and ice surfaces every 12 days.
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BEFORE: Much high-resolution Earth observation data was commercially paywalled or restricted. NOW: Both space agencies have implemented a strict free and open data policy, ensuring data availability within 24 to 48 hours (and even faster for disaster emergencies).
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BEFORE: Detecting minor shifts in the Earth's crust from space was constrained by lower resolution limitations. NOW: NISAR's interferometric SAR capabilities can measure vertical surface deformations as minute as 1 centimetre, providing critical early warnings for volcanic eruptions, landslides, and subsidence.
What Did NOT Change
Despite the groundbreaking nature of the payload, ISRO relied on its tried-and-tested heritage hardware for the satellite's foundation, specifically utilizing the standard I-3K structural bus heavily used in previous INSAT communication satellites. Furthermore, physical ground-truthing remains indispensable; calibration during the science phase still heavily relies on terrestrial corner reflector antennas deployed across locations like Ahmedabad.
Prelims Angle
NCERT Connection
Common Misconceptions
✗ Because it uses the GSLV rocket and the I-3K bus, NISAR is a heavy communication satellite.
✓ NISAR is strictly an Earth observation and scientific satellite. The I-3K bus, traditionally used for communication satellites, was selected because the massive radar payload requires immense power (6.5 kW) and structural support.
The Geosynchronous Satellite Launch Vehicle (GSLV) and the I-3K bus are almost exclusively associated with India's GSAT/INSAT telecommunication constellation.
✗ NASA and ISRO contributed equally to the $1.5 billion funding of the mission.
✓ NASA bore the vast majority of the mission's cost (approximately $1.1-$1.2 billion), while ISRO's contribution was roughly $96 million (around ₹788 crore).
The mission is heavily promoted as an 'equal partnership', which accurately reflects the shared scientific access and joint engineering effort, but not the financial breakdown.
✗ NISAR is placed into a Geosynchronous orbit because it was launched by the GSLV.
✓ NISAR was injected into a 747 km near-polar, Sun-synchronous Low Earth Orbit (LEO).
The 'G' in GSLV stands for Geosynchronous, leading to the assumption that every payload it carries goes to a high-altitude geosynchronous or geostationary orbit.
Practice Questions
Q1
How Many CorrectConsider the following statements regarding the NASA-ISRO Synthetic Aperture Radar (NISAR) mission: 1. It was injected into a Geosynchronous Transfer Orbit (GTO) by the GSLV Mk II launch vehicle. 2. NASA's L-band radar payload has a longer wavelength than ISRO's S-band payload, allowing it to penetrate dense forest canopies. 3. Data from the mission is kept restricted under the strategic defense protocols of India and the United States. How many of the above statements are correct?
Q2
Match the FollowingMatch the components/features of the NISAR mission (List I) with their respective providers or properties (List II): List I A. S-band SAR payload B. L-band SAR payload C. Orbit Type D. Antenna Reflector Size List II 1. Sun-synchronous (near-polar) 2. ISRO 3. 12 meters 4. NASA Select the correct code:
Q3
Assertion & ReasonAssertion (A): The NISAR satellite combines both L-band and S-band microwave radar frequencies on a single platform. Reason (R): Optical imaging satellites face severe limitations in providing continuous global data due to heavy cloud cover and the absence of solar illumination at night. Select the correct answer:
Day 5 Priorities Done
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