While it often feels like the world's going to hell in a Hummer, global warming has a new unlikely byproduct-and it's not all bad. As climates change, certain regions actually stand to benefit from the shift: Where there was ice, there may one day be shipping ports; where agriculture was unsustainable, it may soon thrive. This is not to say that anyone is rooting for global warming-and, in fact, all related studies show the economic toll of global warming to be far weightier than its possible benefits-but some savvy businesses are recognizing the practical realities of a planet in transition. And, it turns out, the smart money is on rising mercury.
Port of Potential
Suddenly, a weather-hardened outpost in Canada is positioned to be the North American portal for goods traveling to and from Europe and Russia.

North Sea Change
If the Northern Sea Route does melt, shipping lanes from Europe to Northeast Asia could be shortened by up to 40 percent.

Migrating Grapes
Champagne growers from France, famous for their unbending traditionalism, have recently begun buying up land in southern England.

Finally Green-land
Average Greenland temperatures have risen by nearly three degrees, and the country's new farmers are suddenly harvesting potatoes from the once frozen ground.

The Catch
For every topical benefit, there is, of course a cost. While melting sea ice in the Arctic might offer an economic upside on both a macro (cheaper international shipping) and micro (boost to Arctic coastal towns) scale, the opening seas may also lead to grimmer prospects. Energy experts anticipate an Arctic oil rush of historic proportions as new petroleum fields are discovered. According to the United States Geological Survey, a quarter of the world's undiscovered oil reserves lie "trapped" under Arctic ice, the cruel irony being that the same fossil fuels responsible for the melt will soon be accessible because of it. And, sure, the British vineyards may squeeze out some fine vintages in years hence, but that'll come at the expense of the beloved grapes of Bordeaux, Provence, and Tuscany, towns where winemaking is more than just a business, but a way of life. Then there is Greenland's ice shelf, which is melting at a rate alarming to both locals and even the most reserved climatologists. Even if Greenland's breweries were making enough melt- water-brewed beer to supply all the pubs in Britain, it wouldn't make a dent in the rise in sea-level predicted if Greenland sheds its entire frozen layer.So while Churchill and Murmansk, the British vineyards, and the entrepreneurial Inuits showcase some finite benefits of climate change, it's hard to argue that the costs aren't higher. Even while representing a government that potentially has the most to gain from a warming planet, Manitoba's transportation minister Ron Lemieux summed it up best: "It's the positive side of global warming … if there is a positive side."