I've been running around outside in a short-sleeve shirt the last two days and, according to the forecast, we're going to reach the low to mid-50s each of the next four days. It's like living 300 miles south of here.
Of course, because it's so warm, we've been using less fossil fuel. Our heating bill is much lower than normal and we're probably driving less and not running the heaters in our car as much. So one way to limit greenhouse gases is to increase global warming.
MORE: Having lived through a life time of New England winters, I should mention that it is clear that mild winters (e.g., global warming) saves lives.