BERLIN — It's rush hour on a cold, snowy morning in Berlin. Commuter traffic has come to a standstill at a highway exit on the western edge of the city, as a dozen climate activists sit down on a pedestrian crossing in front of four lanes of cars and trucks.
The activists belong to a group called Letzte Generation, or Last Generation. Like many scientists, they argue that it'll be too late for future generations to stop the climate crisis if governments don't act now.
