A bridge to a renewable future or just hot air? The energy industry touts natural gas as the cleanest of all fossil fuels and a bridge to a renewable future. Others say we should stop using it all together. Manuela Saragosa speaks to Marco Alvera. the boss of Snam, one of Europe's biggest gas pipeline operators, about the future for gas, and Anthony Marchese from Colorado State University, who's done research into the impact of gas leaks. Charlie Kronick, senior climate adviser at Greenpeace UK, explains why gas shouldn't be part of the long term energy mix.

Producer: Laurence Knight

(Photo: Gas flaring at an oil field in Montana, United States, Credit: Getty Images)