1、Many people do not know anything about the Earth Day. They have no idea about what the Earth Day is or how to make our world a safer and cleaner place. For a long time San Francisco had more smog(烟雾)thanany other city in America. Because of this, and in order to solve the pollution problem and prote
2、ct the people in the city, the first Earth Day was made on April 22, 1970 in San Francisco. It is hard to imagine that in 1972 only 36 percent of Americas lakes and streams were safe to fish and swim in. Today more than three fifths are fit for swimming and fishing. Since the creation of the Earth Day, millions of people around the world have done things every day to save resources(资源), to protect our living environment and to create abetter world for our children.
