The environmental movement's past recently collided with its future. April 22 marked the 50th anniversary of the first Earth Day, a milestone for environmentalism. A few days later, a global school strike was organized by Fridays for Future, the international coalition of young people inspired by Greta Thunberg's protests against climate change. But after months of careful planning, both occasions were upended by the COVID-19 pandemic—and went online instead.
