As global warming threatens the future of our society, Jo Fidgen tackles the ways in which ordinary people can make a difference.

We're often told that we could help the environment by driving less, eating less meat, or using less water.

But in the face of a challenge as significant as global warming, how big a difference can small changes really make? And what would the world look like if we took those solutions to their logical extremes?

Oil is everywhere around us - not just in energy, but in everything from pipes and plastic to cosmetics. For an individual, giving up oil is next to impossible, despite its long record of environmental damage. But what are the best ways to cut down on our oil consumption? And what would a world without oil look like?

Producer: Robert Nicholson

A Whistledown production for BBC Radio 4