More than 20 million people from 180 countries joined World Cleanup Day on Sept. 21, the coordinating group said on Wednesday. Coordinated by the Let's Do It Foundation, the second annual World Cleanup Day (WCD) gathered 20 million people in 180 countries this year, 2 million more people than 2018, and 23 additional countries joined this clean sweep around the world, the group said in a statement. "World Cleanup Day ...