China is often used as a warning exemple in the ongoing debate about our sick environment. That's why I think it's fun to post this vid. It's from the chinese company Greenbaba (I suspect the name translates as "Daddy Green"*), and shows a test of a solar water pump. Greenbaba specialises in solar gadgets and their website has a quite good facts section on solar energy.
*Mandarin is a language with few phonemes (sound units) and lots of morphemes (meaning units). I haven't found the chinese signs for the company, so I can't be 100% sure that "baba" stands for "daddy".