| 1 | Solar energy is a type of renewable energy. | |
| 2 | This country is accelerating the development of new energy. | |
| 3 | We should protect the environment and save energy. | |
| 4 | Natural gas is a cleaner energy source than coal. | |
| 5 | Renewable energy sources are a sustainable supply of power. |
Copyright © Purple Culture Co., Ltd. 2001 - 2026. All right reserved.
