A treaty to protect the world's oceans has been agreed after a decade of talks

FILE - Fish swim near some bleached coral at Kisite Mpunguti Marine park, Kenya, June 11, 2022. For the first time, United Nations members have agreed on a unified treaty on Saturday, March 4, 2023, to protect biodiversity in the high seas — nearly half the planet's surface. (Brian Inganga/AP)

WASHINGTON — For the first time, United Nations members have agreed on a unified treaty to protect biodiversity in the high seas — nearly half the planet's surface — concluding two weeks of talks in New York.

The U.N. Convention on the Law of the Sea came into force in 1994, before marine biodiversity was a well-established concept.