Local journalism in the UK has been described as being “crisis”. newspapers have experienced years of declining circulations and staff cuts, leading to questions about how effectively thos...

Observations in the Lake Powell area have indicated that a significant visibility impairment often exists in this area located in southern Utah and northern Arizona (a schematic illustration of the area is provided in Figure 1). Since several National Park areas within this region are mandated by federal legislaton as Class I areas under the Prevention of Significant Deterioration (PSD) of the ...