The climate气候）doesn't always stay the same. It changes slowly over hundreds or even thousands of years. In the last 100 years the global temperature has gone up by about 0.75C. The Earth's temperature is getting warmer faster than ever before. As a result of the changing climate the world's ecosystems/生态系统）are also changing faster. For example, mangrove forests（红树林）and coral reef in some parts of the world have been reduced rapidly for years. Increasing tempertures have also led to loss of homes for polar bears.
So what is causing climate change? The main cause is huge amount of greenhouses but the reason for this is the world's population. As the population increases, more land is needed to provide food, and more energy is needed. Burning fossil fuels化石燃料）produces CO2. What's more, we are cutting down presents for farmland, eating a lot of meat and drinking a lot of milk from cows. All of these activities produce a lot of gases and make the Earth hotter.
No one knows exactly what is going to happen to it in the future. Lots of CO2 and other gases are now in the air and they will on time to make the Earth hotter for hundreds of years. This means that ice will come water so seas will rise and some places will be under water. The weather will be worse and there will be more storms.
It sounds very bad, but it is possible to help stop these changes to our climate. We need to stop burning fossil fuels and get enough energy from renewable fuels like solar energy, hydroelectric（水力电）energy wind power to reduce the amount of CO2 in the air. We can also travel less in planes, eat lees meat and make changes at home to use less energy. We must do something before it is too late.
