These two images weren’t taken exactly from the same spot at the same time. But it was close. The huge difference in air quality is only apparent, with the direction relative to the sun being the primary difference between the two. The top photo looks across the Strait of Juan de Fuca (note the fog bank) and into the hazy distant view of Vancouver Island. Below looks south towards the Upper Graywolf valley and the Olympic Mountains. Backlighting the haze really makes it stand out.