 For Vermont Public, I'm Jen Jarecki with news headlines. Vermont and other New England states have seen steep increases in diseases spread by ticks, like Lyme, and researchers are still trying to understand why. But they say it's clear that human-caused climate change is helping disease-carrying deer ticks thrive further north. Richard Osfeld of New York City's Cary Institute for Ecosystem Studies has been keeping track of tick populations in the Northeast for a long time.