In the old days people would convert diesel trucks and cars to run on "biodiesel" which was lightly processed used cooking oil. You could tell who did that because their cars always smelled like french fries.
In the UK, all the used oil from MacDonalds is converted into biodiesel. I often walk past the plan where they do this and there's usually a lorry waiting to be allowed in through the gates.
A few years back there was some eco-warrior protest outside trying to stop the lorries going in. Not really sure what they were trying to achieve with that as it seemed counter to their aims.
In the UK, all the used oil from MacDonalds is converted into biodiesel. I often walk past the plan where they do this and there's usually a lorry waiting to be allowed in through the gates.
A few years back there was some eco-warrior protest outside trying to stop the lorries going in. Not really sure what they were trying to achieve with that as it seemed counter to their aims.