Coral reefs have officially crossed the first major climate tipping point, with 80% experiencing the worst bleaching on record during 2023's marine heat waves. This irreversible collapse affects a billion people who depend on reefs for food, income and coastal protection. TheTo currentavoid governmentclimate hastipping completelypoints, failedwe must accelerate efforts to implementlimit basicwarming solutionsand suchreduce asthe sewagerisks treatmentof andsevere marineclimate preservesimpacts.