Changes

In this study, Plass postulated the release of CO2 into the atmosphere by industrial and other human activities may have caused the temperature rise noticed in the twentieth century.

In this study, Plass postulated the release of CO2 into the atmosphere by industrial and other human activities may have caused the temperature rise noticed in the twentieth century.

The term global warming was first thought to be used by Wallace Broecker, a geochemist from Columbia University's Lamont-Doherty Geological Observatory. His paper, ''Climatic Change: Are We on the Brink of a Pronounced Global Warming?'' <ref>http://blogs.ei.columbia.edu/files/2009/10/broeckerglobalwarming75.pdf</ref> acknowledged the scenario of global warming, though there was a common acknowledgement that airborne aerosols may cause global cooling.  

The term global warming was first thought to be used by Wallace Broecker, a geochemist from [[Columbia University]]'s Lamont-Doherty Geological Observatory. His paper, ''Climatic Change: Are We on the Brink of a Pronounced Global Warming?'' <ref>http://blogs.ei.columbia.edu/files/2009/10/broeckerglobalwarming75.pdf</ref> acknowledged the scenario of global warming, though there was a common acknowledgement that airborne aerosols may cause global cooling.  

A National Academy of Science study of carbon dioxide's impact on climate published in 1979 also used the term global warming to refer to surface temperature change. <ref>http://www.atmos.ucla.edu/~brianpm/download/charney_report.pdf</ref> Jule Charney of the Massachusetts Institute of Technology in Cambridge declared: "If carbon dioxide continues to increase, we find no reason to doubt that climate changes will result and no reason to believe that these changes will be negligible.” Climate change was still used to refer to the other changes thought to be caused by increased CO2.

A National Academy of Science study of carbon dioxide's impact on climate published in 1979 also used the term global warming to refer to surface temperature change. <ref>http://www.atmos.ucla.edu/~brianpm/download/charney_report.pdf</ref> Jule Charney of the [[Massachusetts Institute of Technology]] in Cambridge declared: "If carbon dioxide continues to increase, we find no reason to doubt that climate changes will result and no reason to believe that these changes will be negligible.” Climate change was still used to refer to the other changes thought to be caused by increased CO2.