04.22.2021 - By PBS NewsHour
To discuss the ambitions of the climate summit and the very real challenges to President Joe Biden's plans, we're joined by Michael Mann, a climate scientist and professor of atmospheric sciences at Penn State University. He's the author of, "The New Climate War: The Fight to Take Back Our Planet." This reporting is part of the international journalism collaborative called "Covering Climate Now." PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders