Exhaust fumes from cars and factories protect the environment.
We cut down thousands of trees every year.
Trees are necessary for life.
We make paper out of wood.
We can use as much water as we want.
We can drop rubbish into the sea.It will become clean later.
Some animals are in serious danger.They can become extinct if we don't protect them.
We produce tonnes of rubbish.
The climate can't change.
Factory waste often pollutes the soil and the water.
