Key player in war on climate change? The Pentagon

(CNN)In the final presidential debate Thursday night, Vice President Joe Biden called climate change an "existential threat to humanity" that we have a moral obligation to address. Whoever leads the country for the next four years in January has an opportunity to substantially reduce carbon emissions while creating millions of new green tech jobs that could help revive and strengthen the American economy after the Covid-19 crisis. Michèle A. Flournoy The Department of Defense has a critical role to play in this effort. It also has a strong interest in doing so. Climate change doesn't just imperil coastal military bases with storm surges or delay exercises when heat waves and fires make it...