Not long was the answer...

Not long was the answer. An environmental author, more interested in selling his published works than telling it like it is, was on BBC TV. He was talking climate change and using the old tactic of mentioning the car exhaust pipe over and above every other polluter. Never mind truck, van, bus, coach, train, ship and aeroplane emissions! Never mind the damage done to the atmosphere by everything from agricultural to industrial output, from electric lights to inefficient domestic boilers. The so-called experts rarely refer to the fact that some central heating systems, for example, cause more pollution than some cars.