Count Me Amongst The Asthmatics Who Prefer Not To Be Breathing Vehicle Fumes.

ME Wright, Harrogate. 
BRIAN Sheridan highlights the folly of leaving engines running in traffic hold-ups, bus terminal etc (The Yorkshire Post, August 25). During the recent hot spell, I noticed many cars parked, with windows closed, engine running and exhaust spewing, presumably to keep the air conditioning going. Is this is more de rigueur than simply opening the windows?
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