Every day ______ people are born on our planet.
More children are born _____.
Are there in Europe many children?
It is getting _____.
The Arctic ice is ________.
Is it necessary to turn off water?
What do pessimists think about water?
What pollutes the air?
How can people save animals and plants?
Why do Polar Bears can't hunt enough good?
What is an evolution?
What are the reasons of disappearing species?
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