Geoscience Reference
In-Depth Information
NASA climate modeler James
Hansen, 1993. In the summer
of 1988, Hansen famously told
Congress that it was “time to stop
waffling” and to say that global
warming was real. He persisted
in his science-based advocacy
up through his retirement from
NASA in 2013. Credit: American
Geophysical Union, courtesy of
American Institute of Physics,
Emilio Segrè Visual Archives.
Vice President Al Gore address-
ing the U.N. General Assembly,
June 27, 1997. Credit: United
Nations, New York.
