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Facing climate fatigue and denial, a backlash against green policy, and increasingly urgent warnings from scientists, the green movement is shifting into a new era.

Two environmentally-minded politicians spell out their opposing visions for where the movement should go next.

Zack Polanski is the leader of the Green Party, preaching a message of ‘eco-populism’. John Gummer is a Conservative Lord and former head of the Climate Change Committee; he thinks the most powerful tool to make change is the free market.

What is the future of the green movement?

Presenter: Justin Rowlatt Series Producer: Ellie House Editor: Matt Willis Sound Design and Mix: James Beard Production Coordinators: Maria Ogundele, Brenda Brown, Sabine Schereck Commissioning Editor: Dan Clarke

Archive: Doechii at Glastonbury, Glastonbury and Doechii filmed by BBC, 28/6/2025 Green Party Hustings at Glastonbury Speakers Forum, The Green Gathering, filmed by Zoe Broughton, 8/7/2025 Margaret Thatcher speech to the United Nations General Assembly, C-SPAN, 8/11/1989