Renewable Energy Certificates (RECs), also known as Green tags, Renewable Energy Credits, or Tradable Renewable Certificates (TRCs), are tradable environmental commodities which represent proof that 1 megawatt-hour (MWh) of electricity was generated from an eligible renewable energy resource.

These certificates can then be sold or traded on the open market and unlike carbon trading programs that increase the cost of emitting carbon, RECs act as an incentive & subsidy to produce more green energy.

Some but not all green hosting companies purchase REC’s to offset their use of non-renewable energy sources.

US Renewable Energy Certificate Products List

• US Department Of Energy

Canadian green power resource:

• pollutionprobe.org

Know of any other great US, Canadian or International REC info websites? Let us know.

Green Tags are created when wind power or other renewable energy is substituted for traditional power. The result is a shift away from our dependence on burning fossil fuel to produce electricity. Using clean renewable energy is friendly to the environment and reduces emissions of carbon dioxide and other greenhouse gases. Green Tags represent the real savings in carbon dioxide and other pollutants that occur when green power replaces burning fossil fuel. Renewable energy is still a little more expensive than buying traditional power so Green Tags are purchased in addition to the electricity that you are now using. Buying Green Tags has the same effect as buying green power. Both replace fossil fuel generators with clean renewables, and both have exactly the same environmental benefits.

Visit the greentag website at