Global Warming

Hottest Summer

A full 90 percent of the world’s population just experienced the hottest summer on record, according to the U.S. agency NOAA.

While it was the second-hottest on record worldwide, most people live in the Northern Hemisphere, where records say it was a tie with 2016 as the hottest meteorological summer.

• French researchers say that mounting atmospheric CO2 from the burning of fossil fuels is warming the Earth’s surface more quickly than earlier predicted.

New models that will replace those used for the current U.N. global warming predictions point to an atmosphere up to 2 degrees Celsius hotter than the 2014 U.N. report had warned.