Carbon

P. T. Barnum is attributed with saying "There's a sucker born every minute" although, he, as the source of this quote is in dispute. Were he alive today, I suspect he would abandon the circus business and jump into carbon credits and carbon trading.

There is a new wave of entrepreneurs aiming to get rich by 
saving the rainforests. Richard Lofthouse reports

Ever wanted to get rich by doing absolutely nothing? In a bizarre way that’s what a bunch of new entrepreneurs and large corporations are trying to do. The formula is ridiculously simple: buy up or lease a tract of rainforest, prop up a deckchair and watch it grow. Put a financial price on its mere existence and sell a range of ‘products’ – called ecosystem services – to polluters. If trees could hear, they’d be setting up trade unions.