Sunrise brief: On Earth Day, Biden pledges to cut U.S. emissions by 50% by 2030

Also on the rise: Recurrent Energy starts work on a 100 MW solar project for Entergy Mississippi, Elon Musk says that Tesla solar panels will only be sold with its Powerwall battery, FPL starts work on another solar project, and Atlas signs a BESS agreement with Hitachi ABB.