When Donnel Baird was in his 20s, he had twin passions, and he didn’t want to choose between them. “I vowed that I was going to try to combine my passion for Black civil rights with trying to do something about climate change,” he says.
He’s doing it now, with a company that he founded called BlocPower. He’s attacking one of the seemingly intractable sources of America’s greenhouse emissions: old residential buildings. And he’s focusing on neighborhoods that don’t have a lot of money to invest.