Leaded petrol, acid rain, CFCs: why the green movement can overcome the climate crisis

Guardian environment correspondent Fiona Harvey discusses why the last 50 years of environmental action have shown how civil society can force governments and business to change and why that should give campaigners optimism for the future. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>