Cooking oil cars on the rise as gas price heats up

A growing number of Americans are setting up mini-refineries in their homes to produce biodiesel, a fuel made from waste cooking oil which is cleaner and cheaper than the petrol sold in gas stations.

The sky-high price of crude oil is scaring everyone.

Biodiesel has Hollywood backers like actress Julia Roberts and Morgan Freeman, is sung about by country star Willie Nelson but also meets the political correctness of the American right wing which has made the campaign against imported oil a mantra.