Since 1970, Earth Day has been held annually on April 22, during which students from universities across the United States gather and increase their understanding of environmental degradation. This event also takes place in some other countries.
This guy pretended to be a bee to smell magnolia near Pace University, New York, USA.(Photo: AP).
Thousands of primary and secondary students also participated in the 1970 Earth Day. In the picture, New York schoolgirls swept near the memorial in the city's Union park.(Photo: AP).
The globe simulates the earth as tall as a 5-storey building built in Washington to celebrate the 25th anniversary of Earth Day 1995. (Photo: AFP / Getty).
The US launched a campaign to clean up toxic waste in the family on Earth Day in 1990. (Photo: Corbis).
Performing costumes made from boxes in Seoul in 1996. (Photo: AP).
Paul McCartney and Ringo Starr, two legendary band members of The Beatles, sang during the Earth Day music show in Los Angeles in 1993. (Photo: Getty).
Nepalese girls in costumes simulating earth in Katmandu in 2002. (Photo: AP).
