Who is the initiator of the 'Fridays for the Future' movement on the environment?

Fridays for the future is a movement that began in August 2018, after 15-year-old Greta Thunberg and other young activists sat in front of the Swedish parliament every School Day for three weeks, to protest against the lack of action on the climate crisis.She posted what she was doing on Instagram and Twitter and it soon went viral.Source: www.fridaysforfuture.org