A、
Carbon dioxide emissions.
B、
El Nino event.
C、
Air pollution.
D、
Climate change.
【正确答案】
A
【答案解析】
A、
Exhaust emissions from cars and other vehicles.
B、
The increasing population and the decreasing green vegetation.
C、
The chemical reaction between methane and nitrous oxide.
D、
The burning of fossil fuels and other human activity.
【正确答案】
D
【答案解析】
A、
Because CO
2
accounts for 65 percent of climate change.
B、
Because the level of CO
2
emissions has reached a record high.
C、
Because the lifetime of CO
2
is very long.
D、
Because CO
2
is a main greenhouse gas.
【正确答案】
C
【答案解析】
A、
The climate can be improved through concrete action.
B、
The climate can be improved through political will.
C、
The climate can be improved due to the Paris Climate agreement.
D、
The climate can be improved as emissions reductions are legally binding.
【正确答案】
A
【答案解析】
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