Beavers play (really minimal) role in greenhouse gas levels

Good question to ask, good research to do, really shitty headline (in the original article) that drastically overstates the conclusions.

“We found that valuable habitat area has been established by beavers over the last century,” Whitfield said. “While this habitat contributes to the global methane gas emissions, the magnitude of this methane source is lower than many other natural sources and unlikely to be a dominant climate change driver.”
— http://www.leaderpost.com/technology/Beavers+play+role+greenhouse+levels/10665708/story.html