The future of humanity's "lifeblood" — water — is under threat across the planet, the UN secretary-general warned Wednesday at the opening of the first major UN meeting on water resources in nearly half a century."We've broken the water cycle, destroyed ecosystems and contaminated groundwater," Antonio Guterres said at the three-day summit in New York, which gathers some 6,500 participants, including a dozen heads of state and government.
