The Navy will become the first branch of the military to request big vendors to report their greenhouse gas emissions and to outline what they are doing to lower them in response to global warming.

"We've got skin in this game," Navy Secretary Ray Mabus told a technology conference on government and climate change on Tuesday, noting that the Navy's fleet is the military's largest user of fossil fuels.

The Navy will not immediately begin implementing the request, and it does not mean that it would cut off vendors from receiving contracts.

The greenhouse gas policy seeks to use the Navy's $170 billion budget to spur fuel providers and other contractors to curb their output of carbon dioxide, which many scientists blame for causing the Earth's temperature to rise.

Mabus said the Navy is faced by glacial melting and rising sea levels, which is spurring interest in combating the effects of climate change.

The move follows a push by the General Services Administration last year that required carbon reporting from vendors that serve the government.

The U.S. military in recent years has called climate change a serious threat to national security. The Pentagon has said climate change is exacerbating everything from droughts to the rise of Islamic terror.

The administration routinely repeats that position when discussing the challenge of global warming as the top threat the world faces. GOP presidential candidates often cite the stance to criticize President Obama's policy priorities.

? This article has been corrected to reflect that the Navy is requesting vendors report their greenhouse gas emissions.