CNN, Fox News, and MSNBC are the most widely watched cable news networks in the U.S. Their coverage of climate change is an influential source of information for the public and policy makers alike.

To gauge how accurately these networks inform their audiences about climate change, UCS analyzed the networks' climate science coverage in 2013 and found that each network treated climate science very differently.

Fox News was the least accurate; 72 percent of its 2013 climate science-related segments contained misleading statements. CNN was in the middle, with about a third of segments featuring misleading statements. MSNBC was the most accurate, with only eight percent of segments containing misleading statements.

The public deserves climate coverage that gets the science right. Media outlets can do more to foster a fact-based conversation about climate change and policies designed to address it, rather than contributing to a broken and inaccurate debate about the established facts of climate science.

CNN

CNN covered climate science 43 times in 2013. Of these segments, 70 percent were entirely accurate, while 30 percent included misleading portrayals of the science.

Most of CNN's misleading coverage stemmed from debates between guests who accepted established climate science and other guests who disputed it. This format suggests that established climate science is still widely debated among scientists, which it is not, and also allows opponents of climate policy to convey inaccurate statements about climate science.

The biggest step that CNN could take to increase accuracy is to stop hosting debates about established climate science and instead focus debates on whether and how to respond to climate change through climate policy.

Fox News

Fox News covered climate science 50 times in 2013. Of these segments, 28 percent were entirely accurate, while 72 percent included misleading portrayals of the science.

More than half of Fox's misleading coverage (53%) was from one program, The Five, where the hosts often instigated misleading debates about established climate science. In general, Fox hosts and guests were more likely than those of other networks to disparage the study of climate science and criticize scientists.

Fox News did show an improvement from a UCS snapshot analysis of Fox News coverage in 2012, in which the network's coverage was entirely accurate in only 7 percent of segments, while 93 percent contained misleading statements. To further improve accuracy, the most productive step Fox News could take would be for hosts and guests to better differentiate between scientific facts about climate change and political opinions about climate policy.

MSNBC