The analysis identified a tipping point of 2047, plus or minus a few years, if there's no effort made before then to curb carbon emissions. At that time, most of the Earth will experience climates that are hotter than any that have occurred between 1860 and 2005. If all this sounds a bit familiar, it's because the new analysis is based on models that have long been publicly available, but no one has ever put together the data in quite this way before, The New York Times reports.