I was in the playground of our local park (mayow park) recently with my 4 year old son. An ice-cream van was parked there in the center of the park and less than 30 meters away from the gates of the playground. The exhaust fumes of that antiquated diesel engine were VERY noticeable and unpleasant. (The noise too actually, but at least that is not detrimental to the health of my child) I assume it stayed there, engine running for most of the day. I will find a channel to complain about that to the council or whoever is in charge of authorizing it. There is enough you can't do when it comes to reducing children's exposure to air pollution. On a side note, I also have problems with the notion of tempting children with sugar and calories in places where they should exercise and be active.