Greta Thunberg has urged European leaders to take 'emergency action on climate change', releasing an open letter co-signed by celebrities including Leonardo DiCaprio, Coldplay, Priyanka Chopra Jonas, Shawn Mendes, Dame Dame Emma Thompson, Margaret Atwood, Mark Ruffalo, Ellie Goulding, and Ben Stiller.

The Swedish activist posted on social media 'It’s time to #FaceTheClimateEmergency. This is our open letter and demands to EU and global leaders, signed by thousands of activists, scientists, representatives of civil society and influencers. We will keep collecting signatures and invite everyone to sign and share'.