11. What is the term used to describe the process of capturing and storing carbon dioxide underground?
a) Carbon sequestration
b) Carbon footprint
c) Carbon offsetting
d) Carbon trading
12. Which country is the largest emitter of greenhouse gases?
a) China
b) United States
c) India
d) Russia
13. What is the main reason behind the depletion of the ozone layer?
a) Greenhouse gas emissions
b) Deforestation
c) Release of chlorofluorocarbons (CFCs)
d) Acid rain
14. Which of the following is not a consequence of climate change?
a) Increased frequency of droughts
b) Reduced agricultural productivity
c) Spread of infectious diseases
d) Decreased sea levels
15. What is the main greenhouse gas emitted by the burning of fossil fuels?
a) Carbon dioxide
b) Methane
c) Nitrous oxide
d) Ozone
