Green certificate

A Green Certificate - terminology predominantly used in Europe but now becoming more widespread globally - are a tradable commodity proving that certain electricity is generated using renewable energy sources. Typically one certificate represents generation of 1 Megawatthour of electricity. What is defined as "renewable" varies from certificate trading scheme to trading scheme. Usually, at least the following sources are considered as renewable:

Green certificates represent the environmental value of renewable energy generated. The certificates can be traded separately from the energy produced. Several countries use green certificates as a mean to make the support of green electricity generation closer to a market economy instead of more bureaucratic investment support and feed-in tariffs. Such national trading schemes are in use in e.g. Poland, Sweden, the UK, Italy, Belgium (Wallonia and Flanders), and some US states.

Once in the grid, renewable energy is impossible to separate from the conventionally generated energy. This makes purchasing of a green certificate equal to purchasing a claim, that the certificate owner consumed energy from the renewable portion of the whole energy in the grid. Therefore certificate purchase does not affect how much renewable energy was actually generated - only how it was distributed.

In contrast to CO2e-Reduction certificates, e.g. AAU's or CER's under the UNFCC, which can be exchanged worldwide, Green Certificates cannot be exchanged/traded between e.g. Belgium and Italy, let alone the USA and the EU member States.

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