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Under new zoning, lemons<br /> invade Dakota

Well, not yet. No lemons in Fargo, yet. But they're headed north.

The folks at the National Arbor Day Foundation have come up with new hardiness zones for the United States. You guessed it: we're getting warmer in much of the country. A convenient truth if you're trying to grow sub-tropical plants in Kansas City. It's easy to fantasize about growing blue mountain coffee in my own back garden, but then there are all those unpleasant consequences: dozens of cities looking like Venice, islands disappearing beneath the waves, killer hurricanes.

Unpleasant truth: when you're hot, you're hot.