The sun's heat helps to warm up the planet and captures carbon dioxide and other gases in the atmosphere.

The ozone layer protects the sun from the ultraviolet radiation, which damages people's skins and causes cancer.

The CFCs which are used in all sorts of plastic products are considered to be ozone-friendly.

Large areas of rainforests have been devastated recently in order to empty the land for farming.

Rainforests which grow on poor soils are cut down or burned and might become a desert.