I believe John Hermanson is quite correct (as btw isn't he always) in
the carcinogenicity of Diesel exhaust neo-debate (OM list digest 2015),
and it's not just the PAH's or particulates--I saw a brief newspaper
report about 4 - 6 months ago saying there's one particular chemical
that ranks among most carcinogenic of all chemicals ever tested. EPA is
expected to come down hard on diesel exhaust soon and I think
particulates and chemicals will both be targeted. CO is a real drag (!)
but at least it isn't carcinogenic as far as we know.
--
Lyle Olsen lo@xxxxxxxx http://www.lylo.com
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