I'd forgotten how nice fresh air is. Anchorage is rated #15 on some list of the US cities with great air quality. I haven't looked up Dallas, but the air quality there is pretty rough on me, especially in the Summer. I have year-round allergies there and then add in the pollution and ozone, plus the artificial air-conditioning and it all makes for a less than appealing air brew.
Ahhh... breathe deep the pure air! Good snoozin' conditions.