Comment by andlier

Actually most new (<5 year old) petrol cars use direct injection which emits much more fine soot particles than diesel with particle filter. In EU particle filter for petrol cars is only mandatory from 2017. Also worrysome that most of the particles are of the ultrafine type which is the most dangerous in terms of cancer-risk etc. https://www.transportenvironment.org/press/new-petrol-engine...