Yesterday a colleague and I were stuck behind a bus, which had a big sign on the back saying to the effect of, "when full this bus produces one fifteenth of the pollution caused by one car and one driver."
So presumably it produces as much pollution when full as 7.5 cars with two people.
But wait, I could see just three people plus the driver and it has a capacity of 70 seats. So it is carrying a rounded up six percent. Thus it's roughly as efficient as one car carrying one person. We were in the more efficient form of transport.
FFS it was a double decker with something like 70 seats and four people in it.
Thus rang the bus company to ask them why they use such a sign on a double decker on such a quiet route. "It's to encourage people to use the bus."
Who's my MP? Who came up with that stupid sign? Grrr!