Joe Pedras

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L.A.'s Smoggy Past, in Photos

L.A. Civic Center masked by smog on January 6, 1948. Courtesy of UCLA Library Special Collections - Los Angeles Times Photographic Archive.<p>Char …

Los Angeles

Lake Erie

By the 1960s, Lake Erie had become extremely polluted, in part due to the heavy industry that lined its shores in Cleveland and other cities. …

After 25 years, Exxon Valdez oil spill hasn't ended

Twenty-five years ago on March 24, the oil tanker Exxon Valdez slammed into Bligh Reef and spilled more than 11 million gallons of crude oil into the cold, clear waters of Alaska's Prince William Sound -- one of the "last best places" on Earth. The oil charged through Prince William Sound and out …

Clean Air Act - The Encyclopedia of Earth

The Clean Air Act is the law that most significantly regulates air quality in the United States.It has been a driving force behind changes in …