River rescuer goes with the flow

Ecology lecturer uses his spare time to float down major waterways checking for environmental pollution

Over the past 11 years, Zhou Xiaoming navigated several rivers in Hunan province in his spare time, sometimes endangering his life as he gathered evidence of environmental pollution.

The 41-year-old from Changsha, Hunan, compiled 100,000 photos and thousands of video hours which he presented to government agencies.