Portsmouth Climate Action Network

We've actually known about greenhouse gases for a couple of Centuries, not decades! This is not 'new' science. Our understanding of just how potent these greenhouse gases can be and the impact they can have on our natural processes is relatively new. But, researchers are currently trying to pinpoint the impacts on the polar regions.

That's why this year has been designated 'International Polar Year' (http://www.ipy.org/). Many of the world's climate scientists are focussing their efforts on understanding better the impact of global warming in those areas. We should have much better data available this time next year. Maybe it'll be good news...