Our environmental carelessness in cities and on freeways and farms affects not only those of us who live in the polluted air and surroundings, but believe it or not, even living organisms far up in the mountains.
Yes, many miles from the sources, fish in the Rocky National Park have been shown to be negatively impacted by air-born nitrogen from fumes from automobile exhausts and power plants and from fertilizers on farms and feedlots.
Here is a Rocky Mountain National Park article that discusses the important science that documents this process.
by Richard Davidian, Ph.D.

