The security community needs to “tell leaders that they won’t be able to guarantee security in a world where we don’t control climate change,” says Nick Mabey in this video from the Environmental Change and Security Program. “Because unless we have the authority of the security establishment and the foreign policy establishment at the table,” he says, “there’s no chance of both delivering the trillions of dollars needed to create a new clean energy economy, but also mak[ing] those tough choices.”