It is a rubbish, waste or other things we throw away.
It is a thick forest in tropical parts of the world, like in Amazone area.
We have so many of them, like air, sea, and land pollution, holes in the ozone layer and so on.
It is our planet
It is the science that studies the relations of plants, people and animals to each other and to their environment
It is a very big problem of our time. If we don't protect them, they will disappear forever.
It is a process of making our environment dirty
A lot of pollution comes from the fumes they get off.
They are experiments with nuclear weapons
It can come from nuclear, solar, electrical or wind power.
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