By Joseph Prezioso / AFP American farmers growing cranberries, a quintessential component of Thanksgiving feasts, have had to adapt their traditional methods to fight the effects of climate change. American farmers growing cranberries, a quintessential component of Thanksgiving feasts, have had to adapt their traditional methods to fight the effects of climate change. The tart red berries, boiled with a heaping dose of sugar to make classic cranberry sauce, thrive only in the right environment — but climate change threatens to make conditions more unpredictable and extreme. After a terrible 2…