Journal and Courier: A panel of Purdue University experts believe one of the best ways to reverse climate change is to set a good example. The panel members spoke to a crowd of about three dozen people at the Indiana State Fair as part of the Purdue Day activities there. “It’s really easy for humans to change the atmosphere of the earth, and that’s what is causing the climate change we’re seeing,” said Paul Shepson, director of Purdue’s Climate Change Research Center. “It’s our responsibility to …