EPA signed a final rule November 9, 2010, setting greenhouse gas (GHG) reporting requirements for the petroleum and natural gas industries. Under the rule, petroleum and natural gas facilities that emit more than 25,000 metric tons of carbon dioxide equivalent a year are required to monitor and report all GHG emissions to EPA. Data collection for these sources will begin January 1, 2011, with first annual reports due to EPA March 31, 2012. The petroleum and natural gas industries emit methane, carbon dioxide and other GHGs. The final rule is effective 30 days after it is published in the Federal Register, or December 31, 2010, whichever is earlier.