CBS This Morning

Climate change journalist on the causes and consequences of historic heat and drought in the U.S.

A record-breaking heat wave is impacting millions across the Midwest and the Northeast. The latest U.S. Drought Monitor Map shows large areas of the Southwest are "exceptionally dry," the worst category. The annual peak of global heat-trapping carbon dioxide in the air has reached another dangerous milestone: 50% higher than when the industrial age began…