A whisky-based biofuel has been developed by scientists at Edinburgh Napier University, which a wildlife charity has claimed will reduce transport pollution.
Biobutanol was created from by-products provided by Glenkinchie Distillery, which is owned by drinks giant Diageo. The new fuel is said to be 30% more powerful than ethanol.
The work is the outcome of two years of study at the university's biofuel research centre and was funded by Scottish Enterprise's Proof of Concept programme to the tune of £260,000.
WWF Scotland said the biobutanol will help a "clean environment" industry cut down on emissions from transport.
The university said it wants biobutanol to be available at the pumps because ordinary cars could use the more powerful fuel instead of petrol, although what seems like a major change may not make much difference tocar insurance cover.
The fuel was created from "pot ale", the liquid left from copper stills, and "draff", the used grains from whisky distillation. The whisky industry produces 1,600 million litres of pot ale and 187,000 tonnes of draff every year.