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
Arctic sea ice is ...
shrinking / melting.
Climate on the Earth is not always the same, it ...
changes / is changing
Factories and plants release ... into the atmosphere.
carbon dioxide and other gases
If the sea level rises ...
the sea will flood some countries / some territories will disappear
Scientists believe it's ... that is driving the temperatures up.
human activity
The process when the earth is warmed up by the Sun, but faster than before because of gases, is called ...
the greenhouse effect