Environmental Science MCQs

1. : What is the main cause of global warming?
(A) Deforestation
(B) Greenhouse gases
(C) Ozone depletion
(D) Acid rain

2. : Which gas is primarily responsible for ozone layer depletion?
(A) Carbon dioxide
(B) Methane
(C) Chlorofluorocarbons (CFCs)
(D) Nitrous oxide

3. : Which of the following is a renewable source of energy?
(A) Coal
(B) Oil
(C) Solar energy
(D) Natural gas

4. : The term “acid rain” was first used by?
(A) Charles Keeling
(B) Svante Arrhenius
(C) Robert Angus Smith
(D) Rachel Carson

5. : Which gas is the most abundant greenhouse gas in the atmosphere?
(A) Carbon dioxide
(B) Water vapor
(C) Methane
(D) Nitrous oxide

6. : Which country hosted the first Earth Summit in 1992?
(A) USA
(B) Brazil
(C) Sweden
(D) Japan

7. : Which of the following is a non-biodegradable pollutant?
(A) Paper
(B) Plastic
(C) Food waste
(D) Cotton

8. : The Kyoto Protocol is related to?
(A) Ozone depletion
(B) Biodiversity conservation
(C) Climate change
(D) Deforestation

9. : Which type of pollution is caused by excessive fertilizers in water bodies?
(A) Thermal pollution
(B) Noise pollution
(C) Eutrophication
(D) Acidification

10. : Which layer of the atmosphere contains the ozone layer?
(A) Troposphere
(B) Stratosphere
(C) Mesosphere
(D) Thermosphere

11. : Deforestation mainly leads to?
(A) Soil erosion
(B) Earthquakes
(C) Volcanic eruptions
(D) Tsunamis

12. : Which of the following is a primary air pollutant?
(A) Sulfur dioxide
(B) Ozone
(C) Smog
(D) PAN (Peroxyacetyl Nitrate)

13. : The main component of photochemical smog is?
(A) Ozone
(B) Methane
(C) Carbon monoxide
(D) Nitrogen gas

14. : Which of the following is an effect of noise pollution?
(A) Asthma
(B) Hearing loss
(C) Skin cancer
(D) Diabetes

15. : Which renewable energy is derived from Earth’s internal heat?
(A) Biomass
(B) Wind energy
(C) Geothermal energy
(D) Hydropower

16. : The process of converting waste materials into reusable objects is called?
(A) Composting
(B) Incineration
(C) Recycling
(D) Landfilling

17. : Which element is most responsible for Minamata disease?
(A) Lead
(B) Mercury
(C) Arsenic
(D) Cadmium

18. : What does “sustainable development” mean?
(A) Development without using resources
(B) Development at the cost of environment
(C) Development that meets present needs without harming future generations
(D) Development using only fossil fuels

19. : Which gas is known as “laughing gas”?
(A) Nitrogen dioxide
(B) Carbon monoxide
(C) Nitrous oxide
(D) Methane

20. : Which energy is generated from moving water?
(A) Wind energy
(B) Hydropower
(C) Geothermal
(D) Nuclear

21. : Which is the largest source of renewable energy worldwide?
(A) Wind power
(B) Hydropower
(C) Solar power
(D) Biomass

22. : Which of the following contributes most to global warming?
(A) Nitrous oxide
(B) Carbon dioxide
(C) Methane
(D) Ozone

23. : Which of these is an example of an invasive species?
(A) Bamboo in Asia
(B) Water hyacinth
(C) Mango tree
(D) Neem tree

24. : Which protocol banned the use of CFCs to protect the ozone layer?
(A) Kyoto Protocol
(B) Montreal Protocol
(C) Paris Agreement
(D) Basel Convention

25. : Which is considered the “lungs of the Earth”?
(A) Sahara Desert
(B) Amazon Rainforest
(C) Himalayas
(D) Arctic Tundra