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After a 1917 U.S. Supreme Court decision, the Los Angeles Times campaigns against billboards in...

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Jay Maushardt, 6, of Sherman Oaks, wears a gas mask and plays with his toys during Echo-Action...

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Declining downtown Los Angeles pedestrian traffic is documented by similar photos at the corner...

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Chemical engineer Edward Liston, right, of Stanford Research Institute (SRI) checks on five...

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UCLA researchers Richard D. Hopa, left, and Hiroshi Kimura, demonstrate new anti-smog device...

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Automobiles at Lynwood wrecking yard are flattened for recycling to Japan, where materials are...

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Six graders march during original Earth Day in 1970.

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For some 40 days and 40 nights, no winter rains in LA.

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January 10, 1949: The day a winter storm stopped everything in Los Angeles. Enjoy the hot weather...