Hundreds of people stand on the Pyla-Sur-Mer beach in France to form a tree on April 22, 2009, the 40th Earth Day. [CFP]
![Hundreds of people stand on the Pyla-Sur-Mer beach in France to form a tree on April 22, 2009, the 40th Earth Day. [CFP]](http://images.china.cn/attachement/jpg/site1007/20090424/000bcdb95f1d0b5b5ae409.jpg "Hundreds of people stand on the Pyla-Sur-Mer beach in France to form a tree on April 22, 2009, the 40th Earth Day. [CFP]")