Sea otters have the potential to play a vital role in protecting the earth from global warming if their existence is not endangered, says an American scientist.

In former kelp forests that have lost their otters, Wilmers says, "all you are left with is piles of urchins and very little else", reports the New Scientist.
Wilmers presented the findings at the annual meeting of the Society for Conservation Biology in Edmonton, Canada, this month.
Source-ANI