1 Match the words in A to the words in B and use them to complete the sentences.

Solution:

1. 1-b, 2-e, 3-a, 4-d, 5-g, 6-f, 7-c
2. 1. toxic is very harmful to the environment.
3. 2. A lot of waste is dumped into this river.
4. 3. Chemicals cause pollution.
5. 4. Natural is environmentally friendly.
6. 5. Many species are in danger of dying out.
7. 6. Forest fires cause many animals to lose their habitats.
8. 7. How can I avoid breathing fumes from cars while cycling in the city?