Professor Gregory Wellenius, an author of the recently-published 4th US National Climate Assessment,  discusses how our rapidly changing climate affects the way we live, work, and play, and what we can do to minimize these impacts. Professor Joseph Braun  discusses the threats environmental chemical exposures pose to human health, including the ways common household chemical exposures before conception, and during pregnancy, infancy, and childhood affect the risk of disease across the lifespan.