A volunteer works on artificial trees made of recycled chopsticks in Dalian, northeast China's Liaoning Province, March 11, 2012. The chopstick trees are made to mark Dalian's participation in the 2012 Earth Hour, a global environmental event organized by the World Wildlife Fund (WWF). (Xinhua/Zhang Chunlei)

Volunteers make artificial trees using recycled chopsticks in Dalian, northeast China's Liaoning Province, March 11, 2012. The chopstick trees are made to mark Dalian's participation in the 2012 Earth Hour, a global environmental event organized by the World Wildlife Fund (WWF). (Xinhua/Zhang Chunlei)

A volunteer works on artificial trees made of recycled chopsticks in Dalian, northeast China's Liaoning Province, March 11, 2012. The chopstick trees are made to mark Dalian's participation in the 2012 Earth Hour, a global environmental event organized by the World Wildlife Fund (WWF). (Xinhua/Zhang Chunlei)

Volunteers made artificial trees using recycled chopsticks in Dalian, northeast China's Liaoning Province, March 11, 2012.

The chopstick trees are made to mark Dalian's participation in the 2012 Earth Hour, a global environmental event organized by the World Wildlife Fund (WWF).