Graeme Ruxton, a researcher at the University of St Andrews, discovered the sauropod dinosaur released about 520 million tons of methane per year.
That amount is comparable to all modern methane emissions from livestock, farming and general industry.
Reuters reports that mammals, including cows, goats and giraffes, emit between 50 million and 100 million tons of methane a year.
Hearing the theory, Thomas Holtz, a paleontologist at the University of Maryland, argued that the creatures did not wipe themselves out with their own wind, as gassy sauropods showed up 200 million years ago but did not die out until 65 million years ago.
Speaking to The AP, climate scientist Andrew Weaver said: "Frankly, methane emissions from dinosaur burps is probably not the number one thing we should be concerned about in modern society."
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