China builds wind farms in renewable energy boom - video

guardian.co.uk, Jonathan Watts and Ken Macfarlane, Tuesday 20 March 2012

Jonathan Watts reports from the Chinese desert province of Gansu, which is undergoing a stunning transformation. It is becoming the front line of China's efforts to reinvent its economy with a massive investment in renewable energy, involving the erection of wind turbines at the rate of more than one an hour and experiments with solar energy on a large scale