This is the first segment of a special two-hour Maine Calling, as we continue to cover the impacts of the COVID-19 pandemic. The global shutdown of travel and other human activity has been the first, massive reduction of resources and emissions to happen on this scale. It's an inadvertent experiment on how climate change could be slowed if everyone in the world curtailed their actions that harm the environment. We discuss what short-term changes have already been measured, and what may happen in