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These data, known as the Keeling Curve, have iconic status in climate change science as evidence of the effect of human activities on the chemical composition of the global atmosphere. [ 37 ] Keeling's initial 1958 measurements showed 313 parts per million by volume ( ppm ).
Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. [32] Global warming—used as early as 1975 [33] —became the more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. [34] Since the 2000s, climate change has ...
In 2004, the geologist and historian of science Naomi Oreskes analyzed the abstracts of 928 scientific papers on "global climate change" published between 1993 and 2003. 75% had either explicitly expressed support for the scientific consensus on anthropogenic climate change, or had accepted it as a given and were focused on evaluating its ...
Climate change could be the reason why. ... Urban areas also can create what's known as "urban heat islands," where the average temperature is about three to four degrees higher than it is in ...
There was no shortage of bleak climate news in 2023, already confirmed as the hottest on record. But amid the gloom, there have also been signs of progress. After a terrible year of climate news ...
Most scientists agree climate change is real, and that it is caused by humans. Fourteen of the 15 hottest years on Earth have occurred since 2000. Last year was the warmest ever recorded.
From ancient times, people suspected that the climate of a region could change over the course of centuries. For example, Theophrastus, a pupil of Ancient Greek philosopher Aristotle in the 4th century BC, told how the draining of marshes had made a particular locality more susceptible to freezing, and speculated that lands became warmer when the clearing of forests exposed them to sunlight.
The Intergovernmental Panel on Climate Change (IPCC) is an intergovernmental body of the United Nations.Its job is to advance scientific knowledge about climate change caused by human activities. [1]