第1个回答 2013-06-11
没有填空原题, 但是有原文, 你可以参照这篇文章来填空.
To understand why the Earth is warming up, first of all, we need to understand why it is warm. Our planet is covered with atmosphere (大气).Sunlight passes through the atmosphere and reaches the Earth. The Sun heats up the Earth's surface. When the heat rises into the air, it is stopped by some special gases (气体)in the atmosphere like GOz,the heat returns to the Earth and keeps it warm. Power stations and cars release (释放)so many greenhouse gases every day. So we can help stop global (全球的)warming by using less electric things such as turning off lights when we leave a room, asking our parents to turn down the heating in our house to save energy. We can also stop global warming by finding other ways of transportation. For example, ride a bicycle or walk in-stead of going by car, Another way to help stop global warming is to plant and care for trees. Be-cause trees take in C02, they are our best friends when fighting against global warming. The problem of global warming cannot be solved in a day. It may take a long time to find clean energy, such as wind energy. It may take a long time to plant the trees again we are cutting down. But every little thing each person can do to save energy and our forests will help. Think a-bout our planet. Think about ways we can help make the Earth a safe and comfortable place for the future.