Clearly there should be no more debate or even thinking about the way to structure humanity’s entire approach to civilization around the (extremely low) level of carbon in the atmosphere.
Oh, wait:
ARTICLE:
Methane may not warm the Earth quite as much as previously thought
KEY QUOTE:
However, the new study reveals that methane’s shortwave absorption has the opposite effect. This finding is based on a detailed analysis of the gas’s absorption at various wavelengths. The result is “counterintuitive,” says climate scientist Robert Allen of the University of California, Riverside. It happens because of the way that methane’s shortwave absorbance affects clouds in different layers of the atmosphere, Allen and colleagues’ simulations suggest.
Primate v. Climate 