Although not everyone is on board, there are clear signs that the earth is experiencing significant climate change. It also seems clear to most scientists that we humans are major contributors to this change. Last week a major climate summit ended with a historic agreement that commits the nations of the world to addressing this important problem. Climate change is a difficult concept to understand, because it's difficult to pinpoint its effects. Is the fact that it is unusually warm this December a sign? Or, better, are changing migratory patterns of birds a sign? Sarah Fredericks reflects on the issue by showing how religious people have been at the forefront of advocating on this issue. I invite you to read and perhaps offer your thoughts on the question of what we can do as people of faith to make a difference?