Cow methane (aka cow farts) causes global warming. Yup, believe it or not, we’ve got enough cows roaming the earth to have a hand in the green house effect. Looks like someone is finally getting on board, at least in Argentina. Scientists there have fitted cows with plastic backpacks to not capture and reuse the methane but to study the affects of different feed has on the cows noxious output. I still think reusing the gas to power farm equipment, etc, would be uber cool.