The city of Baltimore sued ExxonMobil and other petroleum companies in 2018, seeking compensation for environmental degradation attributable to climate change. That lawsuit is grinding its way through the judicial system. Johns Hopkins University in Baltimore was one of the first big higher education institutions in the U.S. to renounce coal power. The university offers a master’s degree in climate studies, and has taken many steps to reduce its carbon footprint. The university’s top donor, former New York Mayor Michael Bloomberg, is an international climate activist.