UN Secretary-General warns: "We face the greatest cascade of crises in our lifetime."

World leaders gathered at the U.N. General Assembly, where the climate crisis and other 'Great Divides' are on the agenda.

World leaders meet at the UNGA in NYC (photo Kyle Glenn)

I have long been called an alarmist for my warnings about climate change, and I still consider that an honorary title. It is a memory from many years ago when climate change was still a fringe issue in diplomacy but already recognized as a real threat by climate scientists and those that listened t…