"bpnjensen" wrote in message
ups.com...
Now that cars burn cleaner, cows are the #1 cause of air pollution in
the Central Valley of California.

To quote you:
"That's the craziest thing I've read in a long time"

CA Central Valley has a remarkable variety of pollution sources, from
dust to ag burning to cows to cars. Each produces a different mixture
of emissions - some more particulates, some more ozone precursors. The
Central Valley has such bad air quality in summer (due to emissions and
climatological factors) that *any* reduction in *any* pollutant is
desirable.

Bruce Jensen


It could be posed that anything (such as a cow) that is a natural part of
the ecosystem cannot part of a pollution problem. Man himself cannot be a
direct part, either, though his machines certainly can as they are not a
natural part of the ecosystem.