Occidental voluntarily reports estimated greenhouse gas (GHG) emissions using several protocols. For our worldwide operations, Occidental uses the Greenhouse Gas Protocol of the World Business Council for Sustainable Development and the World Resources Institute, supplemented by business-specific protocols (American Petroleum Institute, American Chemistry Council and International Petroleum Industry Environmental Conservation Association). We have reported on GHG emissions to the CDP (formerly known as Carbon Disclosure Project) since its inception in 2003. Carbon dioxide (CO2) is the predominant component of Occidental's GHG emissions, while the remainder is primarily methane (CH4).
Our most recent CDP Climate Change Program questionnaire is available
In 2015, Occidental's estimated total GHG emissions on an equity-share basis decreased by approximately seven percent, after adjusting for the disposition and reclassification of certain oil and gas assets in North Dakota, Colorado and Yemen . This decrease is the result of a 7.7-percent decrease in direct emissions – the company's equity share of emissions from facilities we operated in 2015 – to 9.3 million metric tons of CO2 equivalents, along with a 6.0-percent decrease in indirect emissions – those associated with electricity purchased from off-site suppliers – to 4.9 million metric tons of CO2 equivalents. In 2015, Occidental's North American operations represented approximately 81 percent of the company's total emissions (direct plus indirect). Operations in the Middle East represented 17 percent, with the balance from operations in Latin America. This distribution is generally consistent with 2014.