Source: http://modernfarmer.com/2014/09/will-lea...

Researchers at Princeton University recently took a deep dive into the lovely autumnal colors of the Northeast and Midwest with an eye on climate change. They found that as the planet heats up, fall foliage will respond in messy, unpredictable ways — and that as a whole, leaves will begin changing color later and the period in which bright orange, red and yellow leaves stay on trees will last longer. But even though tourists in Vermont may celebrate, it’s important to note that the researchers’ findings indicate changes that could extend beyond fall photo ops. Trees, as it turns out, are the canary in the coal mine.