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From: novikoff@tesla.UUCP (Eric A. Novikoff)
Newsgroups: net.auto,net.consumers
Subject: Re: Re: No Leaded Gas -- Now What? [trees]
Message-ID: <544@tesla.UUCP>
Date: Fri, 22-Mar-85 10:01:06 EST
Article-I.D.: tesla.544
Posted: Fri Mar 22 10:01:06 1985
Date-Received: Sun, 24-Mar-85 03:56:32 EST
References: <341@ho95b.UUCP>
Reply-To: novikoff@tesla.UUCP (Eric A. Novikoff)
Organization: Cornell University, Electrical Engineering Dept.
Lines: 15
Xref: watmath net.auto:6211 net.consumers:2033
Summary: 

>Ever hear of the Great Smoky Mountains, or the Blue Ridge Mountains?
>Supposedly, southern pines emit a fair amount of ozone (I think
>that's the right gas), which causes a bluish haze, etc.

Trees actually emit large amounts of hydrocarbons, which combine with
ozone in the air under the influence of sunlight to produce various highly
toxic, yellow-brown pigmented organic chemicals commonly referred to as
"photochemical smog."  In these mountains, not only do you have a lot of
pines emitting hydrocarbons, but you also have a lot of thunderstorms
to generate ozone...  Check your car sometime: note the elaborate precautions
to prevent escape of gasoline vapor.  In some urban areas, vapor-recovery
nozzles are also required at gas stations.  Controlling hydrocarbon
emmissions is the key to controlling modern smog.

Eric Novikoff