In northern Vermont, where I live, old newspaper clippings show pictures of people driving trucks across Lake Champlain. Those icy, ephemeral corridors, though, seem like relics of a bygone era.
Roughly half a century ago, maybe more, the region started to warm. At first, the change was imperceptible. The lake froze every year between 1850 and 1917 and then almost every year until the late 1940s. This past decade, though, thaw years outnumbered freeze years. This February, the lake froze for the first time in seven years.
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