Critical Mass bicycle rides started in 1992 in California and have since spread around the world. Hundreds of people ride together in a group on roads, forcing cars to go at bicycle speed. They often chant, “Critical Mass, don't use gas!”
There will be a Critical Mass ride in Brattleboro. It starts December 21 at the town common at 5:45 p.m.
The goal is to get politicians to deal with climate change, which the world's leading scientists say is a major threat to earth's ability to support human life.