Because I mostly grew up in Logan, Utah, the fact that often has the dirtiest air in America (in the winter) is most discouraging.
The immediate problem is a strong inversion layer. The nearby valleys are snow-free and warm and Cache Valley (Logan) remains with snow and still air that allows the auto exhaust to build up. The longer term problem is too many automobiles, sprawl and lack of public transit. This is in a cultural area where they used to pride themselves on how well the towns and cities were planned.
It seems that only old-timers remember when planning was preached from the pulpit.
Story. Winter’s bad air still choking [Northern] Utah: Logan, Salt Lake City pollution levels among highest nationwide. By Judy Fahys The Salt Lake Tribune
Related story: “As you breathe the muck we Utahns ruefully call air, you might be wondering what your Legislature did to help clean it up. We are happy to report some good news on that front and give Utah’s lawmakers their due for passing three good bills.” Clearing the air: Legislature passed three good bills, dropped a fourth. Editorial in the Salt Lake Tribune.
