There are a lot of ways to protect the environment. Firstly, we should turn off the air conditioner when we are not in use. It can reduce air pollution, save electricity and money. Secondly, we should take a public transport to go to work or school instead of using private motorbike or car, so we can reduce a lot of air pollution. Thirdly, we shouln't throw trash away because it can affect to the air and cause air pollution and land pollution. Finally, we should plant more trees and flowers. It can produce oxygen and reduce carbon dioxide to make the air fresher.

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