The RECs you purchase will support new renewable energy projects, like wind, solar, low impact hydro, and biomass, which allows you to directly affect how much renewable energy is produced and delivered to the energy grid.
Since it is almost impossible to request that only "green" energy be delivered to your home or business by your current electricity provider, RECS provide a cost effective way, generally less than $.02 per kilowatt hour, for people to get the environmental benefits of renewable energy and claim 100% usage.
Each 1000 kWh of clean, renewable electricity reduces the need for 1000 kWh of pollution-causing power.
The purchase of RECs also generate additional reinvestment funds for generators to continue building renewable energy facilities and make them more competitive with electricity made from fossil fuel sources like coal and natural gas.
Greenhouse gas emissions reduction. Your purchase will cause the retirement of verified greenhouse gas ("GHG") emissions offsets (a.k.a., "carbon offsets" or "carbon credits"), a tradable environmental currency that can neutralize your impact of travel, manufacture, and transportation. When you retire offsets, you remove them from relevant registries and take them permanently out of circulation, thereby preventing their future use.