The three Rs mean...
The increase in the world's temperature.
This logo indicates that the item can be recycled
Chose the pictures which show the right attitude towards the environment.
ecology
the Earth
Many wildlife habitats will be destroyed if people ... polluting the environment.
If we dump all sorts of chemicals into rivers, we ... swim in them in future.
Soon the Earth's resources will be exhausted if the human population ... to grow.
If the sun radiation can't escape into space, the Earth's temperature ... steadily.
If the global temperature ... , sea levels ... too.
People will run out of drinking water one day if they ... it more rationally.
Nowadays there are a lot of ___________ animals that can become extinct very soon.
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