Are markets and companies beginning to grasp the threat of global warming? Ed Butler speaks to Meryam Omi, head of sustainability and responsible investment strategy at Legal and General, a major investor, about divesting from companies that contribute to climate change. And Jeff Colgan, director of security studies at the Watson Institute, Brown University, in the US, tells us why he thinks sectors like insurance, property and oil and gas are overpriced given the threat of climate change. Bjorn Otto Sverdrup, senior vice president for sustainability at Equinor, Norway's state-back oil company, outlines what changes his company is making.

Producer: Laurence Knight

(Photo: Climate change protesters in London, Credit: Getty Images)