Re: Who cares if it isn't harmful? some pople do
"do you have a choice of inhaling the toxic fumes of petrol cars or the carcinogenic particles of the diesel cars ? errr no"
Which is why the exhaust output of petrol and diesel engines has been subject to increasingly tight restrictions over the last 50 years.
I can tell there's a smoker in the car in front of me by the smell. Why isn't what comes off the end of a cigarette regulated?