UPSC Environment & Ecology Previous Year Questions

Q4. Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?...

Plastic Pollution

Q5. Consider the following substances: I. Ethanol II. Nitroglycerine III. Urea Coal gasification technology can be used in t...

Coal Gasification

Q10. Consider the following statements: Statement I: Activated carbon is a good and an attractive tool to remove pollutants f...

Activated Carbon

Q11. Consider the following statements: Statement I: Studies indicate that carbon dioxide emissions from cement industry acco...

Cement Industry Emissions

Q12. Consider the following statements: Statement I: At the 28th United Nations Climate Change Conference (COP28), India refr...

COP28 Declaration on Climate and Health

Q13. Consider the following statements: Statement I: Scientific studies suggest that a shift is taking place in the Earth's r...

Earth's Rotation and Climate Change

Q14. Consider the following statements: Statement I: Article 6 of the Paris Agreement on climate change is frequently discuss...

Paris Agreement Article 6

Q15. Which one of the following launched the 'Nature Solutions Finance Hub for Asia and the Pacific'?...

Nature Solutions Finance Hub

Q16. With reference to 'Direct Air Capture', an emerging technology, which of the following statements is/are correct? I. It ...

Direct Air Capture (DAC)

Q17. Regarding Peacock tarantula (Gooty tarantula), consider the following statements: I. It is an omnivorous crustacean. II....

Peacock Tarantula (Gooty Tarantula)

Q18. Consider the following statements: I. Carbon dioxide (CO2) emissions in India are less than 0.5 t CO2/ capita. II. In te...

India's CO2 Emissions

Q20. With reference to the planet Earth, consider the following statements: I. Rain forests produce more oxygen than that pro...

Oxygen Production on Earth

Q39. Consider the following statements: Statement I: Circular economy reduces the emissions of greenhouse gases. Statement II...

Circular Economy

Q65. Artificial way of causing rainfall to reduce air pollution makes use of...

Artificial Rainfall (Cloud Seeding)

Q70. Which organization has enacted the Nature Restoration Law (NRL) to tackle climate change and biodiversity loss?...

Nature Restoration Law (NRL)

Q73. Consider the following statements : Statement I: Of the two major ethanol producers in the world, i.e., Brazil and the U...

Ethanol Production

Q74. The World Bank warned that India could become one of the first places where wet-bulb temperatures routinely exceed 35°C....

Wet-Bulb Temperatures

Q30. According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur diox...

Air Pollution (Sulphur Dioxide)

Q46. Consider the following statements : Statement-I : The European Parliament approved The Net-Zero Industry Act recently. S...

International Environmental Initiatives (EU)

Q61. The organisms "Cicada, Froghopper and Pond skater" are :...

Biodiversity - Insects

Q62. Consider the following statements : Statement-I : Many chewing gums found in the market are considered a source of envir...

Pollution - Plastic Pollution

Q63. Consider the following pairs : Country Animal found in its natural habitat 1. Brazil Indri 2. Indonesia Elk 3. Madagasca...

Biodiversity - Animal Habitats

Q65. Consider the following statements : 1. Lions do not have a particular breeding season. 2. Unlike most other big cats, ch...

Animal Species Characteristics

Q66. Which one of the following is the correct description of "100 Million Farmers" ?...

International Initiatives (Environment)

Q67. Consider the following: 1. Battery storage 2. Biomass generators 3. Fuel cells 4. Rooftop solar photovoltaic units How m...

Distributed Energy Resources

Q68. Which one of the following shows a unique relationship with an insect that has coevolved with it and that is the only in...

Plant-Insect Interactions

Q69. Consider the following : 1. Butterflies 2. Fish 3. Frogs How many of the above have poisonous species among them ?...

Poisonous Species

Q70. Consider the following plants 1. Cashew 2. Papaya 3. Red sanders How many of the above trees are actually native to Indi...

Native Plant Species of India

Q76. One of the following regions has the world’s largest tropical peatland, which holds about three years worth of global ca...

Tropical Peatlands and Carbon Sequestration

Q77. With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer product, co...

PFAS (Forever Chemicals)

Q78. Consider the following : 1. Carabid beetles 2. Centipedes 3. Flies 4. Termites 5. Wasps Parasitoid species are found how...

Parasitoid Species

Q79. Consider the following plants 1. Groundnut 2. Horse-gram 3. Soybean How many of the above belong to the pea family ?...

Plant Families (Fabaceae)

Q86. Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill was...

Sustainable Aviation Fuel (SAF) Feedstocks

Q97. Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?...

Fuel Cell Electric Vehicles (FCEVs)

Q98. Recently, the term "pumped-storage hydropower" is actually and appropriately discussed in the context of which one of th...

Pumped-Storage Hydropower

Q99. "Membrane Bioreactors" are often discussed in the context of:...

Membrane Bioreactors