Earth is off to a hot start in 2020. On the heels of the warmest January in recorded history and the second-warmest February, the planet has now logged its second-hottest March on record, the National Oceanic and Atmospheric Administration announced Thursday. It’s just the latest milestone in what NOAA says is a clear, long-term warming trend. And though there are nine months left in the year, the agency’s models are already suggesting that there’s a good chance that 2020 could end up as the warmest year since record-keeping began in 1880. “It does look like there’s a better-than-half probability that...