It looks like methane is a greater threat than CO2 to global warming. I knew cows were destructive, but they make fossil fuel powered cars look benign by comparison:
Methane is so good at trapping heat that one ton of the gas causes 32 times as much warming as one ton of CO2 over the course of a century.
And methane levels are rising but no one knows for sure why.
I wonder if the melting of the Siberian permafrost is a contributing factor. Or is there an increase in composting, causing an increase in methane gas?
The article mentions landfills as a possible culprit, but I thought only the surface level on a garbage mountain could decompose and create methane.