UPSC Civil Services Exam 2026: Master Environment Current Affairs for Top Sarkari Naukri Ranks – Top 50 MCQs Here !

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đź“Š UPSC CSE 2026: At a Glance

Organization Union Public Service Commission (UPSC)
Post Name IAS, IPS, IFS, & Group A/B Central Services
Total Vacancies 933 Posts
Application Deadline February 24, 2026 (until 6:00 PM)
Prelims Exam Date May 24, 2026
Official Website [suspicious link removed]

🌿 Focus Area: Environment Current Affairs

To ace the Prelims and GS Paper 3, you must master the dynamic intersection of static ecology and current events. Focus your preparation on:

  • Climate Change & COP Developments: Detailed analysis of recent UN Climate Change Conferences, India’s Net Zero 2070 roadmap, and Green Credit Initiatives.

  • Biodiversity Conservation: New National Parks, Wildlife Sanctuaries, and updates to the Wildlife Protection Act.

  • Environmental Governance: Landmark NGT (National Green Tribunal) judgments and the E-Waste Management Rules 2026.

  • Renewable Energy: India’s progress in the International Solar Alliance (ISA) and Green Hydrogen Mission.

  • Global Reports: Critical findings from the IPCC, UNEP, and the State of Forest Report (ISFR).

🎓 Eligibility Criteria

  • Educational Qualification: Must hold a Bachelor’s degree in any discipline from a recognized university. Candidates in their final year are also eligible to apply.

  • Age Limit (as of Aug 1, 2026): * Minimum: 21 Years

    • Maximum: 32 Years

    • Relaxations: OBC (3 years), SC/ST (5 years), and PwBD (10 years).

đź“ť The Selection Journey

The UPSC CSE is a rigorous three-stage marathon. Your environmental expertise will be a thread that runs through all of them:

  1. Preliminary Examination: Two objective papers (GS I & CSAT). Environment typically accounts for 15–20% of GS Paper I.

  2. Main Examination: Nine descriptive papers. GS Paper 3 specifically tests Environmental Pollution, Degradation, and Disaster Management.

  3. Personality Test: Insightful discussions on India’s environmental stance and local ecological issues in your home district.

đź“Ą How to Apply for UPSC CSE 2026

  1. One-Time Registration (OTR): Visit upsconline.nic.in to create your permanent profile.

  2. Generate URN: Receive your Universal Registration Number, which serves as your lifetime ID for all UPSC exams.

  3. Fill CAF: Complete the Common Application Form, ensuring your live photo capture matches your uploaded image.

  4. Exam Specific Form: Select Civil Services Examination 2026, choose your optional subject, and select your exam center.

  5. Payment: Pay the fee (â‚ą100 for General/OBC Male; Exempt for Female/SC/ST/PwBD).

UPSC 2026 Notification and Major Changes

This video explains the 15 major changes in the UPSC 2026 notification, including the new application process and eligibility rules.

Top 50 MCQs

Section 1: Climate Change & International Conventions 

  1. The ‘Baku-Belem Roadmap’ is associated with which international process?

    • A) UN Convention on Biological Diversity (CBD)

    • B) UN Framework Convention on Climate Change (UNFCCC)

    • C) Ramsar Convention on Wetlands

    • D) Basel Convention on Hazardous Wastes

    • Answer: B. It outlines the progression from COP29 (Baku) to COP30 (Belem).

  2. Under the Paris Agreement, the ‘New Collective Quantified Goal’ (NCQG) refers to:

    • A) A new target for global forest cover by 2050.

    • B) A post-2025 climate finance goal to replace the $100 billion annual target.

    • C) The percentage of global GDP to be spent on solar energy.

    • D) The number of electric vehicles to be produced by 2030.

    • Answer: B.

  3. India’s ‘Long-Term Low-Emission Development Strategy’ (LT-LEDS) aims for Net Zero by:

    • A) 2030

    • B) 2045

    • C) 2050

    • D) 2070

    • Answer: D.

  4. The ‘Global Stocktake’ (GST) mechanism is scheduled to happen every:

    • A) 2 years

    • B) 5 years

    • C) 10 years

    • D) Year

    • Answer: B.

  5. Which greenhouse gas has the highest Global Warming Potential (GWP) among the following?

    • A) Carbon Dioxide

    • B) Methane

    • C) Nitrous Oxide

    • D) Sulphur Hexafluoride (SF6)

    • Answer: D.

  6. The ‘Kigali Amendment’ is an amendment to which protocol?

    • A) Kyoto Protocol

    • B) Montreal Protocol

    • C) Nagoya Protocol

    • D) Cartagena Protocol

    • Answer: B. It aims to phase down Hydrofluorocarbons (HFCs).

  7. What does ‘Article 6’ of the Paris Agreement primarily deal with?

    • A) Climate Education

    • B) Carbon Markets and International Cooperation

    • C) Gender Equality in Climate Action

    • D) Protection of Oceans

    • Answer: B.

  8. The ‘Loss and Damage Fund’ was formally operationalized at which COP?

    • A) COP21 (Paris)

    • B) COP26 (Glasgow)

    • C) COP27 (Sharm el-Sheikh)

    • D) COP28 (Dubai)

    • Answer: D. (Initial agreement at COP27, operationalized at COP28).

  9. ‘Common But Differentiated Responsibilities’ (CBDR) is a principle originating from:

    • A) Rio Earth Summit 1992

    • B) Stockholm Conference 1972

    • C) Vienna Convention 1985

    • D) Minamata Convention 2013

    • Answer: A.

  10. The ‘Global Methane Pledge’ aims to reduce global methane emissions by at least 30% from 2020 levels by:

    • A) 2025

    • B) 2030

    • C) 2040

    • D) 2050

    • Answer: B.

Section 2: Biodiversity & Conservation

  1. The ’30 by 30′ target for biodiversity conservation is part of:

    • A) Aichi Targets

    • B) Kunming-Montreal Global Biodiversity Framework

    • C) CITES Appendix I

    • D) Wildlife Protection Act (India)

    • Answer: B.

  2. In India, the ‘National Biodiversity Authority’ (NBA) is headquartered in:

    • A) New Delhi

    • B) Dehradun

    • C) Chennai

    • D) Nagpur

    • Answer: C.

  3. Which of the following is an ‘Ex-situ’ conservation method?

    • A) National Parks

    • B) Biosphere Reserves

    • C) Wildlife Sanctuaries

    • D) Seed Banks

    • Answer: D.

  4. The ‘Red Data Book’ is published by:

    • A) WWF

    • B) UNEP

    • C) IUCN

    • D) Conservation International

    • Answer: C.

  5. ‘Project Tiger’ in India was launched in the year:

    • A) 1970

    • B) 1973

    • C) 1982

    • D) 1992

    • Answer: B.

  6. Which Indian state is home to the ‘Sangai’ (Dancing Deer)?

    • A) Manipur

    • B) Assam

    • C) Nagaland

    • D) Arunachal Pradesh

    • Answer: A. (Keibul Lamjao National Park).

  7. ‘Operation Clean Art’ was launched in India to crack down on the illegal trade of:

    • A) Ivory

    • B) Mongoose hair brushes

    • C) Tiger bones

    • D) Star Tortoises

    • Answer: B.

  8. The ‘Great Indian Bustard’ is primarily found in the grasslands of:

    • A) Western Ghats

    • B) Thar Desert (Rajasthan/Gujarat)

    • C) Sundarbans

    • D) Terai region

    • Answer: B.

  9. What is a ‘Flagship Species’?

    • A) A species that has gone extinct recently.

    • B) A species chosen to represent an environmental cause, such as an ecosystem in need of conservation.

    • C) A species that provides food for all other species in a habitat.

    • D) An invasive species that destroys local flora.

    • Answer: B.

  10. The ‘Global Tiger Forum’ (GTF) is an inter-governmental body based in:

    • A) Russia

    • B) India

    • C) Thailand

    • D) Vietnam

    • Answer: B. (New Delhi).

Section 3: Environmental Governance & India Specifics

  1. The ‘National Green Tribunal’ (NGT) was established under which year’s Act?

    • A) 1986

    • B) 2002

    • C) 2010

    • D) 2015

    • Answer: C.

  2. ‘Eco-Sensitive Zones’ (ESZs) are notified under:

    • A) Wildlife Protection Act, 1972

    • B) Environment Protection Act, 1986

    • C) Forest Conservation Act, 1980

    • D) Biological Diversity Act, 2002

    • Answer: B.

  3. The ‘Green Credit Program’ (GCP) focuses on:

    • A) Only Carbon reduction

    • B) Voluntary environmental actions like water conservation and afforestation

    • C) Penalizing plastic use

    • D) Subsidizing electric cycles

    • Answer: B.

  4. ‘Eutrophication’ is primarily caused by an excess of:

    • A) Heavy metals

    • B) Nitrates and Phosphates

    • C) Carbon Dioxide

    • D) Plastic waste

    • Answer: B.

  5. The ‘Miyawaki Method’ is a technique for:

    • A) Deep sea fishing

    • B) Urban afforestation

    • C) Organic farming in hills

    • D) Solar panel cleaning

    • Answer: B.

  6. Which Indian act provides for the concept of ‘Community Reserves’?

    • A) Environment Protection Act

    • B) Wildlife Protection Act (Amendment 2002)

    • C) Forest Rights Act

    • D) Panchayati Raj Act

    • Answer: B.

  7. ‘Fly Ash’ is a byproduct of:

    • A) Hydroelectric power plants

    • B) Nuclear power plants

    • C) Thermal (Coal) power plants

    • D) Wind turbines

    • Answer: C.

  8. The ‘Air Quality Index’ (AQI) in India monitors how many pollutants?

    • A) 5

    • B) 8

    • C) 10

    • D) 12

    • Answer: B. (PM10, PM2.5, NO2, SO2, CO, O3, NH3, and Pb).

  9. ‘Mission LiFE’ (Lifestyle for Environment) was first introduced at:

    • A) COP21

    • B) COP26

    • C) G20 New Delhi Summit

    • D) Earth Day 2024

    • Answer: B.

  10. The ‘Montreux Record’ is a register of:

    • A) Endangered birds

    • B) Hazardous waste sites

    • C) Wetlands under threat

    • D) Carbon-neutral cities

    • Answer: C.

Section 4: Ecology Concepts & Renewable Energy

  1. What is ‘Ecotone’?

    • A) A zone of transition between two diverse ecosystems.

    • B) The deepest part of an ocean.

    • C) A type of sound pollution measurement.

    • D) The peak of a mountain.

    • Answer: A.

  2. ‘Biological Oxygen Demand’ (BOD) is a standard criterion for:

    • A) Measuring oxygen levels in forest air.

    • B) Measuring pollution assay in aquatic ecosystems.

    • C) Assessing the photosynthetic rate of crops.

    • D) Testing air quality in mines.

    • Answer: B.

  3. The ‘International Solar Alliance’ (ISA) was jointly launched by India and:

    • A) USA

    • B) France

    • C) Germany

    • D) Japan

    • Answer: B.

  4. ‘Green Hydrogen’ is produced by:

    • A) Reforming natural gas.

    • B) Gasification of coal.

    • C) Electrolysis of water using renewable energy.

    • D) Capturing hydrogen from volcanic eruptions.

    • Answer: C.

  5. The ‘Carbon Cycle’ is a:

    • A) Sedimentary cycle

    • B) Gaseous cycle

    • C) Hydrological cycle

    • D) Local cycle only

    • Answer: B.

  6. ‘Lichen’ is a symbiotic relationship between:

    • A) Fungi and Bacteria

    • B) Algae and Fungi

    • C) Roots and Bacteria

    • D) Algae and Viruses

    • Answer: B.

  7. What is ‘Bio-accumulation’?

    • A) The increase in concentration of a pollutant in a food chain.

    • B) The gradual buildup of a chemical in an individual organism’s body.

    • C) The process of composting organic waste.

    • D) The growth of algae in a pond.

    • Answer: B. (Distinguished from Bio-magnification).

  8. The ‘Stockholm Convention’ is a global treaty to protect human health from:

    • A) Mercury

    • B) Persistent Organic Pollutants (POPs)

    • C) Ozone depletion

    • D) Climate change

    • Answer: B.

  9. In an energy pyramid, how much energy is typically transferred to the next trophic level?

    • A) 1%

    • B) 10%

    • C) 50%

    • D) 90%

    • Answer: B.

  10. The ‘Blue Flag’ certification is an eco-label for:

    • A) Organic cotton

    • B) Cleanest beaches

    • C) Sustainable fisheries

    • D) Eco-friendly aviation fuel

    • Answer: B.

Section 5: Pollution & Miscellaneous

  1. ‘Minamata Disease’ is caused by poisoning of:

    • A) Lead

    • B) Cadmium

    • C) Mercury

    • D) Arsenic

    • Answer: C.

  2. ‘Itai-Itai’ disease is caused by chronic poisoning of:

    • A) Mercury

    • B) Cadmium

    • C) Lead

    • D) Copper

    • Answer: B.

  3. Which pollutant is primarily responsible for ‘Acid Rain’?

    • A) Carbon Monoxide

    • B) Sulphur Dioxide and Nitrogen Oxides

    • C) Methane

    • D) Particulate Matter

    • Answer: B.

  4. The ‘Earth Overshoot Day’ is calculated by:

    • A) WWF

    • B) Global Footprint Network

    • C) IPCC

    • D) World Bank

    • Answer: B.

  5. ‘Coral Bleaching’ is primarily a result of:

    • A) Ocean acidification

    • B) Rise in sea surface temperature

    • C) Overfishing

    • D) Oil spills

    • Answer: B.

  6. What is ‘Bioremediation’?

    • A) Using plants/microbes to clean up contaminated soil or water.

    • B) A new way of producing organic medicines.

    • C) Capturing carbon in deep geological formations.

    • D) Recycling plastic into fuel.

    • Answer: A.

  7. The ‘Rotterdam Convention’ deals with:

    • A) Hazardous chemicals in international trade.

    • B) Conservation of migratory species.

    • C) Protection of the Ozone layer.

    • D) Limiting nuclear testing.

    • Answer: A.

  8. ‘Bhopal Gas Tragedy’ involved the leakage of:

    • A) Methyl Isocyanide

    • B) Methyl Isocyanate

    • C) Ethyl Isocyanate

    • D) Potassium Cyanide

    • Answer: B.

  9. Which ecosystem is known as the ‘Lungs of the World’?

    • A) Taiga Forests

    • B) Amazon Rainforests

    • C) Mangroves

    • D) African Savannah

    • Answer: B.

  10. The ‘UNEP’ (United Nations Environment Programme) is headquartered in:

    • A) Geneva

    • B) New York

    • C) Nairobi

    • D) Paris

    • Answer: C.

Preparation Tip: For UPSC CSE 2026, always link these static facts with the latest reports (e.g., Emissions Gap Report, IPCC AR6/AR7) and the specific stance India takes in global forums. Good luck!

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