You guys need to pay closer attention to the news...
Clearly the mass effect of the dreaded Mad Cow epidemic from a few years ago, has significantly reduced the amount of methane gas in the atmosphere thus minimizing the greenhouse effect and causing temperatures to drop recently.
Not to worry though because the global mass effect of the latest science backed media scare about H1N1 should have enough people on the planet all running a fever at the same time, inevitably raising the ambient temperature to above average any day now.
Stay tuned and believe everything you hear in the news, read in the scientific literature and are told by your mechanic. They must know what they are talking about, they are employed and get paid, right?