the environment

2. / operating in a way that does not harm the environment
7. / you can give it back to the company that sold it to be used again and you get your money back
9. / to raise animals, grow crops etc. without using artificial chemicals
10. / the general weather conditions usually found in a particular place
12. / a natural or chemical substance that is spread on the land or given to plants, to make plants grow well
15. / a device on a car that reduces the amount of poisonous gas that is released from the exhaust
16. / the gradual warming of the earth because of heat trapped by carbon dioxide and other gases in the atmosphere

1. / energy that is produced using the sun, wind etc., or from crops, rather than using fuels such as oil or coal
3. / a chemical substance made and used for killing insects, especially those that eat plants
4. / to damage something so badly that it cannot be used
5. / to make air, water, or earth dirty or harmful to people, animals, and plants, esp. by adding harmful chemicals or waste
6. / he gas formed when carbon is burned, or when people or animals breathe out
8. / a forest in a hot area of the world that receives a lot of rain
11. / a gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the Earth and stopping heat escaping into space
13. / the air, water, and land in or on which people, animals, and plants live
14. / animals or plants that may soon not exist because there are very few now alive