Humans are driving climate change, federal scientists say
New U.S. report tallies impacts from hottest-ever years to extreme weather threats
![Jakobshavn Glacier in western Greenland](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/11/110317_CG_climate-change_main.jpg?fit=860%2C460&ssl=1)
RETREATING ICE Jakobshavn Glacier in western Greenland (its front edge, where ice is calving into the ocean, shown here in 2012) is one of the world’s fastest-shrinking glaciers. A new U.S. report increases projections of average global sea level rise due to accelerating ice sheet melting if greenhouse gas emissions continue unabated.
Jefferson Beck/NASA