Сput the sentences into passive voice. 1) greenpeace supporters organize demonstrations to protect the environment. 2) many farmers use chemicals to protect crops from insects. 3) greenhouse gas causes global warming. 4) the government introduces new laws to save the earth for younger generations. 5) the ozone layer protects the earth from the harmful effects of the sun. 6) ecologists believe that people can save the planet for their children.

1. Demonstrations are organized to protect the environment (by Greenpeace supporters).
2. Chemicals are used to protect crops from insects (by farmers).
3. Global warming is caused (by greenhouse gas).
4. New laws are introduced to save the planet for younger generations (by the government).
5. The Earth is protected from the harmful effects of the sun (by the ozone layer).
6. The planet could be save for their children.

(то что в скобках можно писать, можно и нет, но правильней не писать.)