Fraud puts the brake on the emissions market

Hot air: what can be traded?

European Union Allowances (EUA) – credits created under the European emissions trading scheme that polluters can trade in a bid to reduce their emissions. One allowance equals one tonne of CO2
.
Certified emission reductions (CERs) and emission reduction units (ERUs) – created under the Kyoto protocol, these credits give rich-country polluters the option of meeting their greenhouse-gas reduction targets by investing in clean-energy projects.