How Greta Thunberg's school strike went global: a look back

Today in Focus talked to the climate change activist Greta Thunberg in March about the campaign of school strikes she started. As part of a series looking back at some of our favourite episodes of 2019, she told our environment editor Jonathan Watts how it all began. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>