Uzupełnij zdania wyrazami podanymi poniżej.

pollution, acid, fumes, greenhouse, ozone, endangered

1. ........................... is when and air is dirty and dangerous.
2. The .................. effect is the warming of the Earth's atmosphere as a result of harmful gases.
3. There are Holes in the ..................... layer and this causes temperatures to rise.
4. Car exhaust ...................... are bad for the environment.
5. ................................ rain is full of chemicals.
6. An animal that's ......................... is an animal that may become extinct.