The old petrol contained lead which was thus emitted and contaminated anywhere near the roads and was ingested by everyone, including children.Just getting back to matters Brummie for a moment! My first car was an Austin A30. New, out of the factory not more than a mile from where I was living. That used to do something approaching 40 miles to the gallon on petrol that was much more crudely refined than today and presumably as it was less interfered with used less of our precious resources. My current all singing, all dancing Toyota