Methane-emitting dinosaurs could have warmed the earthSome scientific findings are just too good to leave alone, even if you don't know if they can ever be confirmed: Such is the case for a study saying that plant-eating dinosaurs could have emitted enough digestive methane to warm Earth's climate 150 million years ago.
"It is known that the time of these dinosaurs was warmer than now," said David Wilkinson, an environmental scientist at Liverpool John Moores University who's the lead author of a paper on the subject appearing in the journal Current Biology. "This is explained usually by an enhanced greenhouse effect, mainly carbon dioxide. If we are correct, then methane from sauropods may have been a contributor to this greenhouse effect."
Methane is a more potent greenhouse gas than carbon dioxide, and modern-day livestock are thought to be responsible for about a quarter of the methane released in the United States. Some say that the belches and flatulence of cattle, pigs and sheep are a significant contributor to the warming effect caused by greenhouse-gas emissions. So why wouldn't it have been the same in the age of giant plant-eating dinosaurs, when global biomass density was at least several times what it is today?
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