Contributor(s): Ed Miliband, James Murray, Farhana Yamin | Can climate activism – from Extinction Rebellion to the school climate strikes – bring about the radical change in government and business that is needed to stop runaway global warming? The Grantham Research Institute hosts a debate about what works in climate politics, and what role street protests can play. Ed Miliband (@Ed_Miliband) is a former leader of the Labour Party and Secretary of State for Energy and Climate Change. He is MP for Doncaster North and an alumnus of LSE. James Murray (@James_BG) is Founder and Editor-in-Chief of BusinessGreen. Farhana Yamin (@farhanaclimate), international lawyer and environmental activist. Robert Falkner is Research Director at the Grantham Research Institute on Climate Change and the Environment, LSE. The Grantham Research Institute on Climate Change and the Environment (@GRI_LSE) was established by the London School of Economics and Political Science in 2008 to create a world-leading