It is healthier to walk along a busy road and breathe in exhaust fumes than to sit in the comfort of an airconditioned car, a U.S. researcher said on Wednesday.Robert Baker, president of the non-profit U.S. Indoor Air Quality Association, said American scientists have found the air inside cars to be more contaminated than the air outside, even in urban areas.This was due to unfiltered air from exhaust fumes and chemical smells from car seats, audio equipment and air fresheners.
