5. From when did the terms global warming and climate change become popular?
In the mid-1950s specialized publications and the press began to talk about the subject. American Scientist, in 1956 published a series of articles on the transfer of radiation and the role of CO2, including a piece pointed at the general public. In 1957, The Hammond Times, to describe Revelle’s research on human intervention in the Earth’s natural greenhouse effect, mentioned the terms “global warming” and “climate change,” and warned of the effects of large-scale CO2 use. But these warnings fell into oblivion for a long time.
It was in 1975 when Wallace Smith Broecker published the scientific article: “Climate change: are we on the verge of pronounced global warming?” Since then the denomination began to be used more and more frequently. In 1976, the declaration of Mikhail Budyko, “has begun a global warming”, had great diffusion. In 1979 the National Academy of Sciences of the United States, led by Jule Charney, described the effects of CO2 in a broader way, attributing its use to the increase of climate change. In 1988 the NASA climatologist James Hansen, testified before the United States Senate: “Global warming has reached such a level that we can attribute with a high degree of confidence a cause and effect relationship between the greenhouse effect and warming observed”. From then on, the term global warming became popular in the press and in the informal language.