As the annual World Earth Day falls on Tuesday, April 22, a primary school in eastern Chinese city of Zaozhuang organized a series of activities on Monday to help the students realize that everyone has the duty to protect our earth.

Students at a primary school in Zaozhuang, a city in eastern China's Shandong Province, take part in a series of activities to welcome the 39th World Earth Day on Monday, April 21, 2008. [Photo: Xinhua]

Xinhua News Agency reports that the theme of those activities is "Get to know the earth for harmonious development."

This year marks the thirty-ninth World Earth Day.

Since it was first launched in the United States in 1970, the 22nd of April has since become a day in which millions who are environmentally conscious take part in educating people on pollution, environmental degradation, and government policies and so on.

Students at a primary school in Zaozhuang, a city in eastern China's Shandong Province, take part in a series of activities to welcome the 39th World Earth Day on Monday, April 21, 2008. [Photo: Xinhua]

(CRI April 22, 2008)