The U.S. Food and Drug Administration on Wednesday approved selling the leading version of naloxone without a prescription, setting the overdose-reversing drug on course to become the first opioid treatment drug to be sold over the counter. It’s a move that some advocates have long sought as a way to improve access to a life-saving drug, though the exact impact will not be clear immediately. Here’s a look at the issues involved. What is Narcan? The approved nasal spray from Gaithersburg, Maryland-based Emergent BioSolutions is the best-known form of naloxone. …

The U.N. General Assembly adopted a landmark resolution Wednesday that will ask the International Court of Justice to issue an advisory opinion on the obligations of states under international law to protect the rights of present and future generations from the impact of climate change. “This resolution and the advisory opinion it seeks will have a powerful and positive impact on how we address climate change and ultimately protect the present and future generations,” said Vanuatu Prime Minister Ishmael Kalsakau, whose government spearheaded the drafting and negotiations of the resolution, …

A joint project between Sudanese and Israeli scientists to study the unique resilience of Red Sea coral reefs has stalled due to red tape [bureaucratic delays], according to those involved. The project has been hailed not only for protecting coral reefs but also for normalizing Israel-Sudan relations. Henry Wilkins reports from Port Sudan, Sudan. …

The French ship the Plastic Odyssey is on a world tour to show how billions of tons of plastic waste is affecting the ocean. Allison Fernandes has this story from the Port of Dakar in Senegal. Salem Solomon narrates. …