Tropical rain forests grow in warm, wet areas ---- Central America South Amereica, Arica, and Southeast Asia . Because it rains a lot there . With so much rain , the soil in rain forests is very dark and rich for plants to grow. More than half of the tropical plants in the world grow in rain forest. Thousands of animals live in them, too.
Rain forests make up less than 8% of the earth, but more than 50% of the plants and animals on the earth live in them. Thick plants makeit difficult to go very far into the forest. Most exploring must be done on foot, or by boat. Therefore, there are large areas that haven't been discovered
yet.
Tropical rain forests are rich for food, medicine and other useful things .
Today , sadly, rain forests are threatened (威胁) by such things as acid rainfrom factory smoke emissions (散发) around the world and from farm expansion(扩张) . A lot of rain forests are burned or cut down each year. The land is used for farming of for building factories. Because of the loss of rain forests , 1000 kinds of plants and animals become extinct(灭绝).
Many people understand the importance of saving the rain forests. Many countries are making rain forests into national parks. Farmers are being taught how to grow crops without hurting the rain forests.
Perhaps you can do something to help protect the rain forests of the earth.