It absorbs hydrocarbon fumes.  With apologies for it not being Friday,
I'm not sure I understand the point of your last statement.  Do you mean
that since there are other sources of pollutants, it's ok if we don't
maintain pollution control equipment on our vehicles?  Like, if there is
someone beating his wife in China, it is all right if a woman in Texas
beats her husband?  Fact is, newer gas cans have gaskets and other means
of blocking fumes.  Another way to help on this is to buy just the
amount of gasoline you need for a specific job, rather than store it.
It goes bad, remember.  Even better, do as I do, and don't keep a lawn
or keep a minimal one and mow it with a battery powered mower that can
be recharged with wind power.

Dave Mc

On Mon, Oct 26, 2009 at 5:07 PM, Chris S wrote:

> It's a part of Al Gore's top secret carbon equistration program.
> Either that or it absorbs the hydrocarbon fumes from our gas tanks
> when the engine runs.  Maintain it by making sure all the vacuum lines
> are connected and not leaking, and remember that for every car with a
> missing canister there are 3 lawn mower gas cans leaking fumes into
> our atmosphere.
>
> 2009/10/26, Michael Sullivan :
>> What is the purpose of this?  Any maintenance required?  Thanks.
>> Michael in San Antonio
>> 91GL AT 'Gringo'
>> 73 Beetle
>>
>
>
> --
> Chris S.
> Disclaimer: "Death and serious injury may occur"