On his first day in office, President Biden signed seventeen executive orders, including orders for the United States to rejoin the Paris climate agreement; to cancel the building of the Keystone XL oil pipeline; and to impose new restrictions on emissions, drilling, and many other threats to the environment. During Biden’s campaign, he promised a climate-change revolution. Two-thirds of the American public expresses support for government action on global warming, Democrats now control both houses of Congress, and activists are making significant headway in the fossil-fuel-divestment movement and other actions. Bill McKibben joins Dorothy Wickenden to discuss how to shift the Zeitgeist and save the planet.