They're losing the battle. So what do they do? Abandon CO2 as the boogeyman, or at least imply that our increasing CO2 has released long-trapped methane. But wait...if methane can be released from trapped ice during warming periods, this means that CO2 can ALSO be released. And we've seen that atmospheric CO2 increases tend to follow warming...not the other way around.
Don't trust these clowns. They are stained by scandal and they approach climate science with a preordained outcome; they never entertain or propose other theories. There is dissension among scientists (and there a lot of skeptical scientists contrary to what you've been told). Remember Carl Sagan's Baloney Detection Kit.
Concerns about global warming have centered on rising levels of carbon dioxide in the atmosphere, but scientists note that methane can be 30 times more effective at trapping heat than carbon dioxide.