Old banger v diesel: Which is more toxic?

Reporter Tom de Castella and his dad each bet that the other's car was more harmful to the environment. It was a petrol-fuelled old banger up against a 2009 diesel.

But when Tom found someone to do the test, he also discovered that some brand new cars were dirtier than either, in one crucial respect.

TAP HERE TO READ WHAT HE FOUND OUT

Image subject to copyright