A fast-moving wildfire in Southern California has scorched more than 100,000 acres since it first started on Wednesday, claiming the lives of two firefighters over the weekend and destroying 21 homes in the mountains north of Los Angeles.

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Some researchers believe that more than 5 million square miles of the Pacific Ocean has become a soup of plastic confetti. Now, scientists are trying to quantify the problem and are studying how plastic affects fish, marine mammals and birds.

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