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And man is not always to blame. Spores can be carried by the weather and 
seeds by birds to spread a species outside it's native location.

There is a non native fungus that attacks soybeans that has shown up in 
the southeastern US working its way north and west. It came over on a 
hurricane a few years ago. A few spores got caughat up in the uplift of 
the storm, traveled across the Atlantic and sprouted in the United States.

We constantly get dust form Afarica falling FL. The Western US is 
getting air pollution from China. The Northeast is getting acid rain 
from the midwest. Be it man or nature that spreads a plant or animal 
outside its "native" environment, this is one small round world and 
there is a continual mixing process ongoing.

Truman

bobmorris@xxxxxxxx wrote:

> Karen:
>
> Stop and think about all the invasive species now present in
> the North American Continent. Think about all that has been
> introduced since pre Columbian times.
>
> Cows, horses, sheep, pigs, pheasants, potatoes, many other
> types of vegetables, many of our grains, your lawn grass, a
> multitude of garden plants as well as our basic lifestyle. 
>  

--

"Only two things are infinite, the universe and human stupidity, and I'm 
not sure about the former."  Albert Einstein





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