A man listens to music inside a solar-powered environmental structure at the National Mall in Washington D.C., the United States, April 19, 2010. A massive Climate Rally will be held in the US capital on Sunday to commemorate the 40th anniversary of Earth Day. [Xinhua]
0 
![A man listens to music inside a solar-powered environmental structure at the National Mall in Washington D.C., the United States, April 19, 2010. A massive Climate Rally will be held in the US capital on Sunday to commemorate the 40th anniversary of Earth Day. [Xinhua]](http://images.china.cn/attachement/jpg/site1007/20100420/00114320f5750d3781f158.jpg "A man listens to music inside a solar-powered environmental structure at the National Mall in Washington D.C., the United States, April 19, 2010. A massive Climate Rally will be held in the US capital on Sunday to commemorate the 40th anniversary of Earth Day. [Xinhua]")
