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Cows absolved of causing global warming with nitrous oxide

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Louise Gray
London Telegraph
Thursday, April 8, 2010

Livestock could actually be good for the environment according to a new study that found grazing cows or sheep can cut emissions of a powerful greenhouse gas.

In the past environmentalists, from Lord Stern to Sir Paul McCartney, have urged people to stop eating meat because the methane produced by cattle causes global warming.

However a new study found that cattle grazed on the grasslands of China actually reduce another greenhouse gas, nitrous oxide.

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Cows absolved of causing global warming with nitrous oxide 110310banner1

Authors of the paper, published in Nature, say the research does not mean that producing livestock to eat is good for the environment in all countries. However in certain circumstances, it can be better for global warming to let animals graze on grassland.

The research will reignite the argument over whether to eat red meat after other studies suggested that grass fed cattle in the UK and US can also be good for the environment as long as the animals are free range.

  • A d v e r t i s e m e n t

Klaus Butterbach-Bahl, of the Karlsruhe Institute of Technology in Germany, carried out the study in Inner Mongolia in China. He found that grassland produced more nitrous oxide during the spring thaw when sheep or cattle have not been grazing. This is because the greenhouse gas, also known as laughing gas, is released by microbes in the soil. When the grass is long snow settles keeping the microbes warm and providing water, however when the grass is cut short by animals the ground freezes and the microbes die.

Full story here.

This article was posted: Thursday, April 8, 2010 at 10:39 am





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