Naomi Klein argues that the greatest contributor to global warming is not carbon and climate change, but capitalism. She tells Anne McElvoy that the market's addiction to growth and profit is killing the planet. But the economist Dieter Helm questions whether capitalism is really at war with the environment and looks to the world's innovators to invent our way out of crisis. Climate change is a global issue, but the author Tahmima Anam looks at what it means for her home country Bangladesh. Jeremy Oppenheim argues that economic growth and action on climate change can be achieved together, with global cooperation.

Producer: Simon Tillotson.