& nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; the earth is the common home of mankind, with the expansion of science and technology development and economy of scale, the earth human survival occurred great changes, frequent outbreaks of various natural disasters, caused great concern in the world, people have called for the treasure resources, protect the earth.
Every year April 22nd is the world earth day, the world's environmental protection people and groups will hold various forms of activities to protect the earth. This year is the world earth day's 44th birthday, to & ldquo; cherish the earth's resources, changing development mode, promote the ecological civilization to build a beautiful China & rdquo; for Earth Day theme is gradually in China set off a new round of upsurge of environmental protection.
