As World's Problems Grow More Challenging, UN Chief Gets Bleaker

UNITED NATIONS - At the annual meeting of world leaders last year, the U.N. chief sounded a global alarm about the survival of humanity and the planet. This year, the alarm rang louder and more ominously, and the message was even more pressing: Wake up and take action - right now.

Secretary-General Antonio Guterres' assessment, delivered in his no-nonsense style, aimed to shock. We are becoming "unhinged," he sai