In this Friday, Dec. 29, 2017 photo provided by the Instituto Boto Cinza, a gray dolphin floats dead in the Bay of Sepetiba, on the coast of Rio de Janeiro State, Brazil. Environmentalists say they are trying to figure out why more than 80 gray dolphins have died in less than a month on the coast of Rio de Janeiro state.
In this Friday, Dec. 29, 2017 photo provided by the Instituto Boto Cinza, a gray dolphin floats dead in the Bay of Sepetiba, on the coast of Rio de Janeiro State, Brazil. Environmentalists say they are trying to figure out why more than 80 gray dolphins have died in less than a month on the coast of Rio de Janeiro state. Instituto Boto Cinza via AP)
In this Friday, Dec. 29, 2017 photo provided by the Instituto Boto Cinza, a gray dolphin floats dead in the Bay of Sepetiba, on the coast of Rio de Janeiro State, Brazil. Environmentalists say they are trying to figure out why more than 80 gray dolphins have died in less than a month on the coast of Rio de Janeiro state. Instituto Boto Cinza via AP)

Brazilian environmentalists studying deaths of dolphins

January 03, 2018 02:26 PM

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