In its report the IPCC emphasises the futility of
subsidies for renewable energy parallel to an emissions trading system: «The addition of a CO2 reduction policy to a second policy does not necessarily lead to greater CO2 reductions,» it says in a literal translation of the IPCC's Technical Summary: «In an emissions trading scheme with a sufficiently stringent cap other measures such as subsidising renewable energy have no further influence on total CO2 emissions.»