Your article on the proposed alternative to pollution controls at Navajo Generating Station (July 26) did a good job of covering many issues, with one major exception. The proponents claim that it will do a better job of reducing nitrogen oxide pollution than normally required control technology doesn't hold up to analysis.

In fact, the several alternative pathways in the proposal all result in more pollution being released over the Grand Canyon and other parks in the region, particularly over the next 15 years. It is a good first step to finding a creative way to reduce pollution while making a transition to cleaner forms of energy, but the alternative needs to be refined to accelerate and ensure pollutant reductions meet the requirements of the Clean Air Act.


Kevin Dahl

Arizona Program Manager

National Parks Conservation Association

Tucson, Ariz.