Carbon credits are the modern day equivalent of the Medieval Papal Indulgences. It goes like this; to compensate for all the carbon that your evil daily activities produce (like wiping your arse), companies are springing up offering to plant trees in exchange (trees absorb CO2 by photosynthesis, you see). Sounds neat, eh?
Tree Appeal 'helps responsible organisations reduce their environmental footprint by planting native British trees'.
Carbon Neutral, an Australian company goes one step further. They will calculate your annual CO2 consumption and then translate that into the number of trees needed to be planted per annum (at the very reasonable price of $3 per tree).
However, Govindasamy Bala a physicist specialising in climate change at the University of California has put the proverbial spanner in the works of this latest gimmick.
There are two counteracting forces at work;