Thousands of scientists plan to march on Washington this weekend. We look at how science is changing the world around us. Before he was elected, President Trump called climate change a hoax. Now, he is rolling back policies meant to lower greenhouse gas emissions. Georges Benjamin says combating climate change is a public health issue. He’s the Executive Director of the American Public Health Association. He joined us with Peter Dykstra, the publisher of Environmental Health News. Bees play an