It's global warming, stupid!

It's been unseasonably warm in Toronto this winter. At least it was until earlier this week, when a snowstorm swept through Southern Ontario and the temperatures plummeted down to normal levels again.

What is it now? -7 celsius (-13 with the wind chill). That's cold.

So is it global warming? The BBC is reporting this:

In the late 20th Century, the northern hemisphere experienced its most widespread warmth for 1,200 years, according to the journal Science.

The findings support evidence pointing to unprecedented recent warming of the climate linked to greenhouse emissions.

What's more, the BBC reports here, "Current levels of the greenhouse gases carbon dioxide and methane in the atmosphere are higher now than at any time in the past 650,000 years".

See also here, here, here, and here for more.