Rainforests are very large, they can be found close to the equator（赤道）, in South East Asia, West Africa and Central and South America. They have very high temperatures and it rains all year round. In a year it can rain as much as 260 cm!
The rainforest is divided into three layers（层）. The canopy（树冠）is the top layer of the trees where most of the animals live. These trees can be more than 30 meters high and it is the noisiest layer of the rainforest. The middle layer is under the canopy and has some shorter trees. The third layer is the forest floor. It has very little sunlight and is the quietest layer of the rainforest. It can take ten minutes for a falling raindrop to travel from a rainforest's thick canopy to the floor.
Rainforests help to protect the Earth's climate（气候）because they take in CO2, a greenhouse gas from the air, and give out O2. Many things we need such as medicines and food come from the rainforests, too.
Unluckily, these rainforests are disappearing. Every second an area the size of a football field is either cut down for wood, to make furniture（家具）, to build houses or to be cleared for farming animals. Action needs to be taken to protect the rainforests now!
