Renewable energy is the energy that can be used again and again The sun and the earth are sources(来源) of renewable energy Here is some information about it.
| Kinds | Facts |
| Solar Energy | ⒈ Two kinds: active solar energy and passive solar energy. ⒉ To get active solar energy, we use special technology; to get passive solar energy, we do not use equipment. ⒊ We can't always get sunshine so sometimes we can't use this kind of energy alone. |
| Energy from Earth | ⒈ The center of the earth is more than 6,000℃. ⒉ Hot water from underground is used to heat houses and other buildings. ⒊ Almost 90 percent of people in Iceland use it as energy. |
| Energy from plants | ⒈ Plants create energy from the sun and it is stored in the plants even after they die. ⒉ We get energy in this way by burning plants. ⒊ It can also be made into fuel (燃料) It can power buses This kind of energy does less harm to the environment than gas. |
| Water Energy | ⒈ It is made by running water in large dams, such as the Three Gorges Dam in China. ⒉ It is inexpensive We can always depend on it, because water always keeps running and the dam does not depend on the weather and time of day. |
