Guardian: China has the largest and one of the most dynamic clean tech sectors in the world. The close to $90bn invested in clean tech last year puts it well ahead of both the EU and the US. For all the recent troubles of companies such as Hanergy, China has some of the worlds largest solar, wind and other green tech companies. As growth slows in western markets, they are increasingly looking for business at home. There is good reason for this too. China burns almost half the coal in the world, and accounts...