on Wilkinson's figures. Dinosaur methane would have hiked temperatures about half a degree (0.3 degrees Celsius), which is a fraction of what's been caused by the burning of fossil fuels like coal and oil in the 20th Century, he said.
What caused the ancient pre human world to be so hot just the way the dinosaurs needed it was a variety of factors. Volcanoes spewed much more greenhouse gases than now, Holtz said. Swamps, water currents, shallow seas and plentiful plankton combined to raise greenhouse gas levels far higher than today, he said.
WASHINGTON (AP) Potty humor just got prehistoric. A new study suggests that dinosaurs may have helped keep an already overheated world warmer with their flatulence and burps 200 million years ago.
Outside climate experts say the study makes some sense, but that the warming from dinosaur gas back then is dwarfed by man made carbon dioxide today from industry.
Andrew Weaver said: "Frankly, methane emissions from dinosaur burps is probably not the No. 1 thing we should be concerned about in modern society."
Gassy dinosaurs helped warm Earth
It's also wrong to suggest the study blames dinosaur flatulence for their extinction, Holtz said. He noted that the Adidas Hoodie For Boys
NASA climate scientist Gavin Schmidt quickly ran some calculations based Adidas Long Sleeve Pink
sauropods started showing up and getting gassy around 200 million years ago and didn't die off until 65 million years ago.
The study looks at the biggest and presumably gassiest dinosaurs, called sauropods. These were the long necked plant eaters that munched on the top of trees. They were large animals that had food fermenting in their guts for long periods of time because of their giant size, said University of Maryland paleontologist Thomas Holtz, who wasn't part of the study.
University of Victoria climate scientist Hoodies Adidas Originals
The research published Monday in Current Biology suggests that large dinosaurs made a significant contribution to the greenhouse effect back then. That's similar to total atmospheric levels of methane today produced by livestock, farming and industry. Cows alone now produce nearly 100 tons a year of methane.
Wilkinson said dinosaur gas was just one factor at a time when the world was quite tropical, about 18 degrees warmer than now (10 Adidas Pullovers degrees Celsius). But he said some in the media and blogosphere have misinterpreted his study to say it was the main cause of ancient warming. Wilkinson said it was only of the causes, but dinosaur gas "is big enough to be a measurable effect," he said in a phone interview.
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