1.When factories and cars pollute the air, the climate is changed.
2. When people throw away plastic bottles, the environment is damaged
3. When a lot of people don’t recycle paper, more trees are cut down.
4.When some children break trees, the birds are disturbed.
5. When people throw litter into the river, the water is polluted.
6. When people leave glass bottles in the forest, the animals are hurt.
