The danger of global warming. Then and now. - Granite Grok

The danger of global warming. Then and now.

Let's see...if that's Boston and that's Montreal, then the ice sheet on New Hampshire around the notched would be about...a mile thick. More global warming please!
Let’s see…if that’s Boston and that’s Montreal, then the ice sheet covering central New Hampshire up around the notches would have been…about a mile thick? MORE GLOBAL WARMING PLEASE! (h/t XKCD.com)