The Difference between a REC and a Carbon Offset
Friday, May 25th, 2007At Standard Carbon, we do not sell RECs. We do not believe that there is anything wrong with the concept, but we want our customers to have an iron clad guarantee that their emissions are being reduced, and this is how we achieve that.
RECs, or renewable energy credits, are an environmental credit that is created by a clean energy project such as wind, solar, biomass, hydro etc. Often they carry a “certification label” from a non-profit like the Center for Resource Solutions (green-e) or the Environmental Resource Trust. RECs exist because there is difference in cost between producing renewable energy and non-renewable fossil fueled energy.
To create an REC, the positive environmental attributes of the renewable energy are striped off and sold to make up part of the difference. For example, an electrical grid has three power plants: two coal fired, and one wind farm. It costs the coal fired plants $3 to produce one unit of power, but the wind farm $4 per unit of power. The wind farm then sells a REC (also called a green tag) to a willing buyer to help subsidize the higher costs of operating the wind farm.
The idea is to promote the competitiveness of clean power by creating an exchangeable credit that can be sold to any willing buyer. This helps consumers and clean power companies because even if there is not a wind farm or other clean power plant connected to your power grid, you can purchase the environmental attributes from one as if it was connected to your grid.
RECs are not the same as carbon offsets. A true carbon offset must meet strict tests for “additionality.” That means that it is not a subsidy to the power company, but rather a payment that changes the usual way that business is conducted. For instance, an existing hydro dam could receive offset credits if it made an investment to increase the yearly efficiency of its water flow to produce more power from a renewable stream. This “additional” clean power reduces the emissions produced by more dirty power plants connected to the same grid. Other examples of additionality include paying farmers to capture and burn the methane from their livestock, or to pay for clean up of industrial chemical process that release greenhouse gas.
The pertinent question is whether someone can reduce their greenhouse gas footprint by purchasing RECs. This question could be answered soon enough by regulations in the US that require “renewable portfolio standards.” But consumer choice will ultimately prevail in the voluntary market. Perhaps that is why many voluntary RECs have fallen in value as compared to true carbon offsets.
When designing climate change strategies for our clients, Standard Carbon recommends purchasing RECs or green tags only for the purpose of supporting clean energy, not offsetting emission. If a clean energy project can pass a UNFCCC test for additionality, then that is a real offset.
