网友回答：
even the temperature of the earth is rising. what should we do to save the earth ? my suggestion is that we should plant more trees， we have only one earth， or we will regret.as time goes by，保卫地球， the river is dirty，
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
