If you've noticed an increase in temperatures and extreme weather and a decline in ice cover of lakes, then you're not alone. Stephen Vavrus is a senior scientist at the Nelson Institute Center for Climatic Research , whose research suggests temperatures and extreme weather have been increasing statewide, with a general increase in temperature of the Great Lakes. His research also suggests that human-caused climate change began not hundreds, but thousands, of years ago with the advent of agriculture. In this episode: how local climate patterns might fit into thousands of years of human-caused climate change.