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When 'Global Warming' Became 'Climate Change'

When exactly did one become the other, and why?
Turkana Tribe's Way Of Life Is Threatened By The Effects Of Climate Change
Photographer: Christopher Furlong/Getty Images

First there was "global warming." Then came "climate change." Turns out, use of the latter became more prevalent in 2008 and that dominance became irreversible in 2009. Here's how use of the terms compare in stories on the Bloomberg Professional service.

The term "global warming," which describes an increase in the Earth's average temperature surface due to greenhouse gas emissions, is widely believed to have been coined in 1975 by Columbia University geochemist Wallace Broecker, according to NASA. Meanwhile, "climate change," which describes a long-term change in the Earth's climate, appeared a few years later in a 1979 National Academy of Science study on carbon dioxide.