About 100 university students ride bicycles and go on a three-hour "green trip" around the Haidian District in Beijing on April 22, 2009. The Earth Day, celebrated on every April 22, is a day designed to inspire people's awareness and appreciation for the Earth's environment. [People's Daily]

A teacher tells children how a robot has been made from waste materials in the Hongqiao Kindergarten of Suzhou, Jiangsu Province on April 20, 2009. The Earth Day, celebrated on every April 22, is a day designed to inspire people's awareness and appreciation for the Earth's environment. [Xinhua]