Thanks very much for your suggested correction robcall. Pollution is an emotive issue and it is important to get the facts right. With over 3000 locations some are bound to be a bit out.

If you download the latest version you will find a link in each placemark balloon that will help you to quickly and easily correct the location using a visual Google Maps interface. I will then update the main posts on a weekly to monthly basis depending on the number of corrections submitted.