Climate on the Earth is not always the same, it ...
changes / is changing
Scientists believe it's ... that is driving the temperatures up.
human activity
Factories and plants release ... into the atmosphere.
carbon dioxide and other gases
The process when the earth is warmed up by the Sun, but faster than before because of gases, is called ...
the greenhouse effect
Arctic sea ice is ...
shrinking / melting.
If the sea level rises ...
the sea will flood some countries / some territories will disappear
Animal extinction means that ...
some animals will die/disappear
How can we help to reduce global warming?
save energy / use special lamp bulbs / travel more by public transport than a car
