Scientists and experts are pushing for meaningful climate action as the effects of global warming continue to intensify. William Moomaw, professor emeritus at Tufts University and visiting scientist at the Woodwell Climate Research Center, discusses steps of a "massive-scale mobilization." Michael Mann, author of "The New Climate War: The Fight to Take Back Our Planet," shares his thoughts on 2021. And Virginie Helias, chief sustainability officer at P&G, gives a look at the CES virtual exhibit showcasing sustainability efforts.