FILE - This May 2, 2013 file photo shows The Carnival Miracle docked in Juneau, Alaska. The nation’s largest cruise ship company will adopt technology from power plants and automobiles to reduce air... more 
FILE - This May 2, 2013 file photo shows The Carnival Miracle docked in Juneau, Alaska. The nation’s largest cruise ship company will adopt technology from power plants and automobiles to reduce air pollution from the massive diesel engines powering its ships. In a tentative agreement reached Thursday with the Environmental Protection Agency (EPA), Carnival Corp. will deploy scrubbers to reduce sulfur dioxide and filters to trap soot on as many as 32 ships over the next three years. At port, ships will plug into the electrical grid, rather than idle, to reduce pollution. (AP Photo/Becky Bohrer, File) less 
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Associated Press | Photo By Becky Bohrer, File
Thu, Sep 5, 2013 5:33 PM EDT