Heavy trucks emit an outsize share of greenhouse gasses and toxic pollutants. But we rely on them for nearly everything we buy. What will it take to decarbonize them?

We hear from staff at the Community Center for Action & Environmental Justice. They're demanding clean air in "America's shopping cart," a polluted region dominated by warehouses and trucking.

And Dr. Ben Sharpe of the International Council on Clean Transportation covers the technologies and policies we need to reach zero-emission trucking.

Guests: Dr. Ben Sharpe is a Senior Researcher at the International Council on Clean Transportation. Anna Gonzalez is the Interim Executive Director of the Center for Community Action and Environmental Justice (CCAEJ). Faraz Rizvi is CCAEJ's Special Projects Coordinator.

The Big Switch is produced by Columbia University's Center on Global Energy Policy in partnership with Post Script Media. This episode was produced by Daniel Woldorff and Alexandria Herr. Theme music and mixing by Sean Marquand. A special thanks to Natalie Volk, Kirsten Smith and Kyu Lee. Our executive editor was Stephen Lacey.