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My favorite blog post headline so far this year: Scientists to make cows fart like kangaroos.

It’s not as absurd as it seems, though… cow digestion produces methane, which is a significant greenhouse gas (mostly through burps, though). Methane is more detrimental to the environment than CO2, but it’s also less common (and perhaps more difficult to reduce).

According to a Slate article:

About 60 percent of global methane emissions stem from human activity—aside from landfills, the chief anthropogenic culprits are natural gas production and use, coal mines, and “enteric fermentation” (the polite term for the burps of livestock).

How long until carbon-neutral burgers are in the supermarket?