Christiana Figueres is the former Executive Secretary of the UN Framework Convention on Climate Change, and it was her work that led to its members signing the 2015 Paris agreement.Together with Tom Rivett-Carnac, she created Global Optimism, an organization focused on bringing about environmental and social change.Their book, The Future We Choose (£12.99, Bonnier), reveals that we are on the precipice of two futures: one where net-zero emissions is achieved, and one where it is not, and this week they’re talking to our editorial assistant Amy Barrett about the Paris Climate Agreement, why we need to reduce carbon emissions, and how we all have a role to play in combating climate change.Read the edited interview –"We stand at the fulcrum between two worlds. It really is a question of choosing what future we wan"tLet us know what you think of the episode with a review or a comment wherever you listen to your podcasts.Subscribe to the Science Focus Podcast on these services: Acast, iTunes, Stitcher, RSS, OvercastWhy you should subscribe to BBC Science FocusListen to more episodes of the Science Focus Podcast:Toby Ord: What are the odds civilisation will survive the century?Mark Miodownik: Are biodegradable plastics really better than traditional plastic?Samantha Alger: What can we do to save the bees?Chris Lintott: Can members of the public do real science?John Higgs: Are Generation Z our only hope for the future?Andrew Blum: How accurately can we predict the weather? Hosted on Acast. See acast.com/privacy for more information.