随着科学技术的发展，人类对环境的污染越来越严重，全球气候变暖已经成为人们关注的重要问题之一。请结合课本内容，围绕节能、降耗和减排等措施，写一篇短文，号召人们行动起来，保护我们的美好家园 — 地球。
With the development of science and technology, the climate has been getting warmer and warmer in recent years. With the development of science and technology, the climate has been getting warmer and warmer in recent years. To stop global warming we should take some immediate measures.
First, it is believed that saving energy is an effective solution to the problem. For example, turn off the lights, the TV, the computer and so on, if we are not using them, and walk or ride a bike instead of using vehicles when possible.
Second, reducing the amount of waste gases and polluted water is another way to protect the earth. People are used to throwing bottles and plastic bags everywhere. Factories pour polluted water directly into the river and heavy smoke into the air. They are harmful to our earth.
We therefore must act now, and we must act globally. However difficult it may be in the short term, we must keep doing it.