Science and technology

Associated Press
In this file photo from  Wednesday, June 6, 2012, a man looks at a 70-foot-long dock with Japanese lettering that washed ashore on Agate Beach Wednesday, June 6, 2012, in Newport, Ore.  More than a year after a tsunami devastated Japan, killing thousands of people and washing millions of tons of debris into the Pacific Ocean, neither the U.S. government nor some West Coast states have a clear plan for how to clean up the rubble that floats to American shores. There is also no firm handle yet on just what to expect. The Japanese government estimates that an enormous 1.5 million tons of debris is floating in the ocean from the catastrophe. Some experts in the United States think the bulk of that trash will never reach shore, while others fear a massive, slowly-unfolding environmental disaster. (AP Photo/Rick Bowmer, File)

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