Do oil companies have a future?

Shareholders and courts pile pressure on the oil majors. Amid falling demand for oil and targets to cut carbon emissions, what role if any do companies like ExxonMobil and Shell have in a decarbonised world? Manuela Saragosa speaks to Aeisha Mastagni from the California State Teachers' Retirement System - a shareholder in ExxonMobil pushing the company to change its long-term strategy. Lord Browne, former boss of BP, tells us why oil companies need to diversify if they want to survive. And Charlie Kronick from Greenpeace explains why the winds have turned agains the oil industry in recent weeks.(Photo: Oil drilling operations in California. Credit: Getty Images)