smog filled parks
| According to an article in Outside Online
about a half dozen of the USA National Parks are as polluted with smog
as some cities |
The artcile notes that "...the biggest causes of smog are emissions from cars, buses, trucks, power plants and industrial facilities. When these emissions—mostly nitrogen oxides and volatile organic compounds—are "cooked" in the sun they turn into ground-level ozone and ultimately smog.
"Because the federal standards call for pollution cleanup on a county level, the eight national parks are responsible for reducing on an individual basis, within their counties.
An EPA spokesperson noted that it wasn't exclusively the "cause" of the parks, but that surrounding areas contributed to the problem.
Now, what was Dubya saying about increasing the number of all terrain vehicles into Yellowstone?