I'm not sure what you're getting at. The scientists explicitly mention the fact that burning methane produces CO2: > If a methane molecule is burned, it produc

I'm not sure what you're getting at. The scientists explicitly mention the fact that burning methane produces CO2: > If a methane molecule is burned, it produces one CO2 molecule. > Methane produces about 2 times as much energy as does coal for the same CO2. Perhaps the title on HN is a bad one, but the scientists are specifically arguing against the assertion that natural gas is even worse for the environment than coal because a large amount of it leaks into the atmosphere before it ever even has the chance to burn.