Mark 4 degrees for the global warming target?

And, that’s 4º Celsius, not Fahrenheit, according to British professor Bob Watson.

Watson says he fully supports the European Union’s goal of limiting the target increase to 2º C but just doesn’t think that’s realizable.

He’s predicting we have nearly a 20 percent change of hitting 4º C and so should prepare accordingly.

He also worries that Arctic waters could release methane hydrides at that point.