The team calculated the animals would have collectively produced more than 520m tons of methane a year - more than all today's modern sources put together.
It is thought these huge amounts could easily have been enough to warm the planet.
It is even possible that the climate change was so catastrophic that it caused the dinosaurs eventual demise.
Sunday, May 06, 2012
The Theory's Almost Dead When They're Reduced To Blaming Ancient Global Warming On...
...you won't believe it, but some scientists are now blaming it on dinosaur farts: