http://petitions.pm.gov.uk/Classic-Cars/

This looks alarming. Is it verifiable? What are the true details?

It certainly sounds barking mad, for example for older Volvos which I know are passing emissions tests with the greatest of ease (one case I know of showed particulates of 0 ppm!), and which spread their lifetime carbon footprint over 20 to 30 years unlike Daewoos which are usually scrap in 5.