April 22 is Earth Day . People all over the world think about our planet . they think abour air , water ,plants and animals.They say our planet is in danger . Many people do not know how to protect animal and plant worlds , how to keep the waters clean and the air fresh . But thwy already to do it .
Water is very important for life on the Earth. It is in oceans , seas,rivers and lakes. There is much water on our planet and at the same time there is little water on it .It is so because very little water on the Earth is for drinking .In many rivers and lakeswateris very dirty.Sometimes people cannot swim even in the sea because the sea a