Blogger Indonesia - Two Japanese boys play with a solar-powered tricycle during the Earth Day 2000 Tokyo exhibtion at Hibiya Park in Tokyo Saturday. April 22, 2000. The solar-powered vehicle is demonstrated by Soft Energy Project. a nonfrofil corporation based in Yokohama, south of Tokyo, one of 73 Japanese environmental groups participated in the two-day event, to mark the 30th anniversary of the international campaign to save the earth. (AP Photo/Katsumi Kasahara)