One of the most basic forms of air Top Star Wars Darth Vader Baby Yoda And Friends Christmas Long Sleeve Shirt pollution – haze – degrades visibility in many American cities and scenic areas. Haze caused when sunlight encounters tiny pollution particles in the air, which reduce the clarity and color of what we see, especially during humid conditions. Since 1988 the federal government has been monitoring visibility in national parks and wilderness areas, for example, in the Great Smoky Mountains National Park. In 1999, EPA announced a major effort to improve air quality in national parks and wilderness areas. Every year there are over 280 million visitors to our nation’s most treasured parks and wilderness areas.
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Unfortunately, many visitors aren’t able to Top Star Wars Darth Vader Baby Yoda And Friends Christmas Long Sleeve Shirts to see the spectacular vistas they expect. During much of the year, a veil of white or brown haze hangs in the air blurring the view. Most of this haze is not natural. It is air pollution, by carrying by the wind often many hundreds of miles from where it originated. In our nation’s scenic areas, the visual range has been substantially reduced by air pollution. In eastern parks, the average visual range has decreased from 90 miles to 15-25 miles. But in the West, the visual range has decreased from 140 miles to 35-90 miles. Haze caused when sunlight encounters tiny pollution particles in the air.
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