Ever since the Hollywood Sign was erected in 1923, many have captured the experience of air pollution in Los Angeles by photographing, drawing, and painting the city's most famous icon as it disappears into the city's smoggy sky. From the artworks of Ed Ruscha to tourist photographs, these representations portray the impact of hydrocarbons and ozone in disrupting our perception of distance, shapes, and shade-a phenomenon known as "contrast reduction." Because the Hollywood Sign is so iconic, everyone knows that it is composed of the letters H, O, L, L, Y, W, O, O, and D, but few consider the actual legibility of its letters in these hazy conditions. During major bouts of smog, and when viewed from a distance, the sign's capitalized letters can appear to create strange spellings, such as "NCLLYWCCD," "HDLLY-WDDD," or even "KGIUVWUUU."
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