Pollution, vessel noise and the availability of food are making it hard for a group of orcas that live along the West Coast to increase their numbers, says a U.S. study.
from CBC | Latest News News http://ift.tt/1qcYnMO
Pollution, vessel noise and the availability of food are making it hard for a group of orcas that live along the West Coast to increase their numbers, says a U.S. study.
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