Ответ:

1. A lot of the world's glaciers are melting.

2. There are thousands of trees in a forest. 3. The Grand Canyon is a huge river valley in the USA.

4. Many people think there should be a lot more nature reserves where animals are safe and protected.

5. Most scientists agree that climate change is going to cause big problems on Earth.

6. Many animals are killed by illegal hunting and

fishing.

7. Oil and other chemicals from factories cause a lot of water and air pollution.