Electric companies in the United States report their direct greenhouse gas (GHG) emissions to federal agencies and agencies in states that have adopted GHG emission reduction policies, including California (CA), Washington (WA) and 12 states in the northeast Regional Greenhouse Gas Initiative (RGGI). In addition, the Securities and Exchange Commission (SEC) recently released final federal regulations that require corporate carbon emission and climate-related disclosures. Internationally, electric companies and combined electric and natural gas utilities report emissions through structures like the European Union Emissions Trading System (EU ETS) and the Greenhouse Gas Reporting Program in Canada. Outside of these regulated markets, the environment for voluntary emissions accounting and offsets trading is complex.