Growing Returns

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Measuring methane emissions from cows is elusive, but we’re getting closer

Cows cause high methane gas emissions

Photo credit: aleks.k

Americans’ fondness for milk, yogurt, cheese and juicy burgers requires a huge livestock industry, with nearly 90 million head of cattle in the U.S. in any one year. All those cows mean significant methane emissions.

With estimates from the United Nations that methane accounts for 44 percent of all greenhouse gas emissions from livestock production, and new determination – including legislation in California – to reduce methane emissions from farms, we need to figure out how to quantify and then reduce those emissions.

Yet measuring methane emissions has been an elusive science. Methane is a colorless, odorless gas that packs a powerful punch: Methane has 84 times the global warming potential of carbon dioxide in the short term. Read More »

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