Most publications on global warming related issues have run stories on belching and farting, methane-emitting cows and sheep in the last 24 months. It’s not just a quirky issue but it’s seriously important. Belching and farting cows and to a lesser extent sheep pose a significant global warming threat to us humans. Cows alone account for 4% of all greenhouse gases in the atmosphere. That’s an extortionate amount.
It’s all to do with the diet cows are on. They daily consume around 150 pounds of grass, hay, and silage as well as 20 pounds of manufactured fodder with high concentrations of fibers and other nutrients. A cow’s stomach is a permanent disco party featuring billions of bacteria and fungi. When the feeding frenzy’s over a bacteria called the archaea will have latched on to the hydrogen and carbon dioxide that the digestive process has produced, causing a chemical reaction of astounding proportions. Each cow emits up to 100 gallons of methane a day because of this. Every day.
The bovine flatulence issue, nothing to cows but insidiously harmful to the atmosphere, is among the thorniest of human related climate change topics because we’re such feisty beef eaters and because it’s so difficult to ‘cure’ cows. Beef consumption has been and will be rapidly rising around the globe. And the consequences of this are considerable. Over the past 50 years, methane levels in the atmosphere have increased six times and much of that is directly linked to human beef consumption.
Belching and farting are such integral parts of the cow metabolism that there’s not a lot that can be easily done about it. So scientists around the globe are now attempting to get to the absolute bottom of the implications of changing the cattle´s diet. That’s as precarious as it sounds.
In some of the research, the Australian kangaroo has featured prominently because this animal is on the same diet as cows and sheep and produces almost no methane. The Queensland government in Australia reportedly is three years away from the production of a medicine modeled on live bacteria from kangaroo stomachs. The bacteria curb virtually all methane production. The researchers want to feed it to both sheep and cows and say a positive side effect of the medicine will be that it improves the digestive systems of cows and sheep to such an extent that they’ll need 15% less fodder.
That news has Australian farmers jumping up and down because it can potentially save them millions of dollars in feed costs. Since they’re facing droughts almost every summer, that’s a very welcome development to them. Whether the kangaroo bacterial medicine will become controversial remains to be seen, but my hunch is that it just might get animal rights activists a bit worried. However, the Australian scientists need at least another three years to even isolate the bacteria and then it will be another nightmare to pinpoint a method to transfer it to animals such as cattle and sheep.
An Australian scientist, Richard Herd, says the rumens of the grey kangaroo are of key importance to curing cows. "Something is happening in their [the kangaroos] stomachs that’s meaning the food as it’s being digested is not producing methane," he told the Australian ABC. "If we can understand how kangaroos can do it, or the bugs in the kangaroos do that, we might be able to do something about twigging what’s happening in the rumen of a cow or a sheep and reduce the methane emissions." (story continues…)
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