China’s environmental movement is one of the few areas in which Chinese citizens can generally speak their mind, according to documentary filmmaker and journalist Gary Marcuse. Marcuse, whose documentary Waking the Green Tiger explores the demonstrations that blocked a dam project in the Tiger Leaping Gorge, says there are between 50,000 and 100,000 environmental demonstrations every year in China. Many citizens protest the country’s high levels of smog and other environmental issues. “They've