China’s insatiable demand for energy is hurting the environment. According to the Netherlands Environmental Assessment Agency, it’s already over-taken the USA as the world’s biggest producer of C02. But in the remote Chinese province of West Guangxi, simple technology is now allowing millions of poor families to cook and keep warm using carbon-neutral biogas, produced from human and animal waste. It’s saving 13 million tonnes of firewood and nearly eight million tonnes of coal every year. Duration: 22 Minutes Formats available : DVD Read Less