We have a next-door neighbour who backs his Ford Transit Connect diesel up to his house. In the morning at about 6:30am to 7:00am he wakes us up starting the engine and then leaves it running for half an hour or more. He says it is to warm up the systems (it is a rapid response van). He usually keeps his house windows closed, but we prefer fresh air and have ours open. I would like your advice on whether there is too much pollution from all the nasties in diesel fuel fumes to be healthy (we can certainly smell it). Our houses are about six feet apart and our nearest window is first floor about 12 feet from his exhaust pipe. Should we make an issue of it?