This is last of a three-part series on carbon and climate change to show how global adversity can be changed into an opportunity Priyadarshi Shukla Ahmedabad: There is an evolving carbon market where carbon offsets are traded. The largest is the European Union's Emissions Trading Scheme (EUETS) established for offsetting emissions limitation committed under the Kyoto Protocol. In recent weeks, the price of a tonne of carbon dioxide (CO2) offset has remained around 25 Euros