Although there is much less of it in the air, it is 33 times more effective than carbon dioxide at trapping heat in the atmosphere and adding to greenhouse warming. (sciencedaily.com)
Both gases are risky, but methane especially so, as it is roughly 25 times as potent at trapping heat as carbon dioxide over the course of a century. (green.blogs.nytimes.com)
The basic physics and chemistry of how carbon dioxide and other human - produced greenhouse gases trap heat in the lower atmosphere have been understood for nearly two centuries. (rabett.blogspot.ru)