explain in detail plz
Joseph Fourier, a French mathematician and scientist, is usually cited as having first noticed and described the greenhouse effect in 1824. In 1896, Swedish scientist Svante Arrhenius was the first to quantify its effects at the time and project the possible magnitude of the phenomenon in the future.
Despite a few scientists’ warnings that global warming could be a problem, it was largely discounted for the next fifty-odd years. In the late 1950s and 1960s, it began to become more widely acknowledged, and concerns about pollution rose.
There appeared to be a brief period of cooling from the 1940s to the 1970s, and opinion about global warming wavered. In the 1980s, however, this trend had obviously stopped, and James Hansen of NASA suggested in 1988 that human activity had already had a significant effect on global temperature.
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