Greenhouse gases trap heat in Earth’s atmosphere, contributing to climate change. One of the most common greenhouse gases is methane. In the United States, cars and industry are the primary sources of greenhouse gases. In Africa, which has more agriculture than industry, burping cows are the main producers of methane gas. Researchers have found that African and American cows are actually quite different from each other in the amount of methane in their burps. African scientists are studying how cows’ diets affect their methane production. Listen to hear how cow burps affect the environment.
Story Length: 2:48
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May 22, 2015
4:30
Greenhouse gas emissions in March were some of the highest ever recorded on the planet in millions of years. Carbon dioxide emissions have built up over time and increased the saturation of carbon dioxide in the atmosphere up to 400 parts per million. Listen to learn about how scientists are able to determine past levels of carbon dioxide and measure this current trend.
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