London restaurants are being asked to donate their waste grease, oil and fat, to help run a special power station.
Thames Water is one of the architects of the plan.
As Martin Stew reports, it hopes it could also lead to restaurants pouring less fat away, which clogs up the capital's sewers:
More top news
As Tibetan Buddhist communities celebrate Buddha's birthday, Lydia Polzer explains the true meaning of the special event.
Video has emerged showing a man being tasered by police during a tense stand-off in east London.
A man from London who was the subject of cruel online taunts has had the last laugh when a group of celebrities threw a party for him in LA.