Guardian: Click! I have just bought 10 sq cm of rainforest for a few pennies on the net. Click click! That’s 0.2 sq ft of Patagonia coastline saved from mining. Click click click! A friend has just given me as a present 1 sq m of the Palmyra atoll, wherever that is. Saving the world’s most beautiful and ecologically important places just got much cheaper and easier. Hundreds of websites run by charities, trusts, and individuals now invite people to buy up forest, field and mountain to save it …