Cow Burps, Landfill Belches, Rotting Stalks, Livestock Dung & More Are Having A Big Climate Impact
a couple of years ago, as it was a key point in discussions of blue hydrogen. There were dueling US and European LCAs, where the European one was vastly more sanguine about the problem than the American one. The American one by Jacobson and Howarth one was higher because they drew the system boundary wider and because they were looking at the quite remarkably bad US upstream emissions.
But when there isn’t any oxygen around, other microbes come out to play. These ones decompose the plant matter and turn it into methane instead. And that’s a problem. Turning plants into CO2 is fine because the global warming potential is a wash, but turning them into methane sucks because of the 26-83 times as bad global warming problem.
Third, stalks from grains and other crops. We don’t eat them, so we pile them up beside fields. Once again, the stuff on the outside gets the oxygen and carbon dioxide results, but the stuff buried in the middle of the piles has no oxygen available, so methane. Seventh, ineffective burning of waste plant matter. In lots of places, the thing to do with lots of waste stalks, dung and wood scraps is to burn it. In theory this turns it into carbon dioxide, but in reality, like flaring natural gas emissions from oil wells, it’s just not that effective. More methane.
There’s a big market for anaerobic digesters because there’s lot of crop stalks, animal dung and the like lying around, waiting to be turned into something useful. Not quite the right attitude, but close.For cow burps, seaweed. There’s a chemical compound in seaweed that acts like Beano for cows, reducing methane burps by up to 80%. Free range cows are hard to get to, but all of the feedlot cattle? Give them seaweed Beano, already.
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