Additional income that is not dependent on the usual return of the project Possible costs for the generation of emissions rights are predictable in the long term Apart from the approvals of the governments involved no more authorizations are needed Tradable emission rights can be generated since 01.01.2000 Emission rights from CDM (CER) are long-lasting (with the exception of afforestation ) and can not be discounted Sales of emissions rights to funds for partial financing of projects are possible It is possible to use CERs in the European Emissions Trading Scheme