How has the Fridays for Future grown?
Soon after Greta Thunberg started striking in August 2018, other young people joined her leading to the school strike for climate movement, know as Fridays for Future, starting.
It's grown from one girl in Sweden to millions of people all around the world.
Mitzi is from Fridays For Future International and she explains how the movements grown and how people are continuing to campaign during lockdown.