News flash: Global warming might really be caused by human activity after all. Seems we have too much clean air lately.
New research from NASA suggests that the Arctic warming trend seen in recent decades has indeed resulted from human activities: but not, as is widely assumed at present, those leading to carbon dioxide emissions. Rather, Arctic warming has been caused in large part by laws introduced to improve air quality and fight acid rain.
So this weekend, be sure to do your part to help combat global warming, and fire up your charcoal grill. Just remember, steaks should always be medium-rare, burgers, medium-well!