The 2020 election campaign season is fraught with unrelenting drama – who's infected now, hate-spewing, and the president's latest Tweetstorm – we lose track of the scale of what's really upon us. Beyond masks and death rates, the pandemic, the high court, the economy, democracy, fear of fascism, and all the rest there looms the Big One, our climate, and how the hammer of climate change will dramatically change our lives. Half of the American population will see a decline in their environment conditional.   People are already on the move, fleeing fires, rising seas, too many hurricanes, too much heat. In the decades in front of us, climate migration - vast movements of people driven by painful climate change - is on track to explode. Abrahm Lustgarten does soften the blow. His New York Times and ProPublica piece over the summer reveals a world already on the move and forecast what's ahead for the United States...