The war is responsible for at least 141 million metric tons of carbon dioxide equivalent (MMTCO2e) since March 2003. To put this in perspective, CO2 released by the war to date equals the emissions from putting 25 million more cars on the road in the US this year.
Between March 2003 and October 2007 the US military in Iraq purchased more than 4 billion gallons of fuel from the Defense Energy Support Center, the agency responsible for procuring and supplying petroleum products to the Department of Defense. Burning these fuels has directly produced nearly 39 million metric tons of CO2 Just transporting 4 billion gallons of fuel to the military in Iraq consumed at least as much fuel as was delivered nearly doubling overall fuel-related emissions.
Emissions from the Iraq War to date are nearly two and a half times greater than what would be avoided between 2009 and 2016 were California to implement the auto emission regulations it has proposed, but that the Bush Administration has struck down.