It was a Monday afternoon when day turned into night in the city of São Paulo. I was visiting an expensive nursery school for my 13-month-old daughter, trying to look remotely worthy of such a sophisticated institution. Although it was not supposed to rain that day, the sky suddenly disappeared behind a dense layer of low, heavy clouds. A two-year-old boy stepped out of his classroom, rubbed his eyes, and looked inquisitively at the principal, who said, “No, it isn’t night yet, dear, and your father’s not here to pick you up. Go back inside.”
Later that day, meteorologists struggled to explain the midday darkness. They eventually blamed low-lying clouds from a cold front combined with smoke from the fires in the Amazon rain forest, thousands of miles away. Many…
