BAD HARDWARE WEEK

It was the models which included human factors that most closely matched the temperature profiles recorded at the poles. "For me, it can't be more clear that human activity is responsible," says Karpechko.

Ironically, the models found that warming would have been even more marked if the ozone layer which cuts out harmful solar radiation had not been depleted by the chlorofluorocarbon chemicals once used in aerosols.

BAD OZONE comment: How nice our own shits cancel each other.