Cars are expensive to run and bad for the environment, but some scientists think they can change all that by using RUBBISH to power them.
They've found a way to turn some of the stuff we throw away into something called bio-ethanol, which can be mixed in with petrol and used in cars.
The scientists say it's a more environmentally friendly way of getting about, and helps get rid of rubbish.
They think a million tonnes of rubbish could run more than a million cars.
Scientists say this can power cars!
For the last 15 years they've been experimenting with turning bio-degradable rubbish - like paper and vegetable waste - into fuel.
They've found a way of doing it by heating it up to a really high temperature.
The gases that are released are mixed in with bacteria, or bugs, which turn the rubbish into bio-ethanol.
In countries like Brazil, lots of cars already run on bio-ethanol, but that's made using plants grown in fields.
John McNally says using rubbish is a good idea for lots of reasons
John McNally, from a company called Ineos which is making the fuel, said using rubbish is a better idea, because then the crops can be kept for food.
He said the bio-ethanol gives off 90% less greenhouse gasses than petrol, and helps get rid of waste.