On this edition of Your Call’s One Planet Series, we discuss the historic UN High Seas Treaty, which provides a legal framework to protect the biodiversity of the world's oceans. The ocean covers about 71 percent of the earth's surface and produces half of the oxygen we breathe, but almost two-thirds of this vast body lies outside international boundaries. The agreement is critical to enforcing the pledge made during last year's UN Biodiversity Conference to protect 30 percent of land and sea by 2030. The treaty still needs to be ratified.