In this Oct. 29, 2019 photo, University of New Hampshire scientists monitor the health of seagrass in the Great Bay in Durham, N.H. On Tuesday, Jan. 7, 2020, federal officials announced a plan to reduce pollution in Great Bay, which calls for a dozen communities ringing the bay to reduce the amounts of nitrogen going into one of the largest estuaries in the Northeast. (AP Photo/Michael Casey)
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