27 March 2008
Carbon credits are generated by enterprises in the developing world that shift to cleaner technologies and thereby save on energy consumption, consequently reducing their greenhouse gas emissions. For each tonne of carbon dioxide (the major GHG) emission avoided, the entity can get a carbon emission certificate which they can sell either immediately or through a futures market, just like any other commodity.
The certificates are sold to entities in rich countries, like power utilities, who have emission reduction targets to achieve and find it cheaper to buy 'offsetting' certificates rather than do a clean-up in their own backyard.
This trade is carried out under a UN-mandated international convention on climate change to help rich countries reduce their emissions. source:times of india 14 th Nov.07 R.V.RAO