Years of campaigning and courtroom battles by U.S. conservationists to limit the underwater noise that turns the oceans into hell for whales and dolphins are beginning to pay off.
+Read MoreThe year 2015 was Earth’s hottest by widest margin on record, and in December 2015 the temperature was the highest for any month in the 136-year scientific record, according to scientists with the U.S. space agency, NASA.
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