"Humanity is now standing at a crossroads."— Sky News (@SkyNews) April 22, 2019
Teenage climate change campaigner @GretaThunberg tells #ExtinctionRebellion crowds in London: "We're waiting for others to follow our example."
Watch Greta's full speech to protesters here: https://t.co/QUurjQb1EB pic.twitter.com/ierROGuBeO