The CIA and Pentagon would for the first time be required to assess the national security implications of climate change under proposed legislation intended to elevate global warming to a national defense issue. The bipartisan proposal, which its sponsors expect to pass the Congress with wide support, calls for the director of national intelligence to conduct the first-ever "national intelligence estimate" on global warming. The effort would include pinpointing the regions at highest risk of humanitarian suffering and assessing the likelihood of wars erupting over diminishing water and other resources.