Nowadays environment have been changed by the developing technology.In order to protect the environment of earth,we must stop to think about what we are doing these years.pollution exists everywhere,such as noise pollution,water pollution.They are all aroud us.If we want to have a better life with a good health,I think we should stop polluting waste things.Home energy(?什么意思)accounts for 21percent of global warming pollution.we should make some smart choices to fight against pollution,for example,we could make some policies to refrain the quantities of pollution.