помогите, пожалуйста, с заданием

Put 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.