Pat Shingleton: "The Stamp of Approval"
The postage stamp has showcased famous and less-famous people, causes and anniversaries. Weatherwise magazine showcased stamps that also include the story of anthropogenic climate change. The earliest example of climate change to be recognized on a stamp was Horace de Saussure who was known for his contributions to meteorology and the development of an early hygrometer. In 1978, the Ivory Coast issued a stamp commemorating the work of Swedish chemist Svante Arrhenius. In the mid 1890s, Arrhenius argued that atmospheric carbonic acid and other trace gasses influence the Earth's radiative balance, showcasing early examples of global temperature through the greenhouse effect. In 1958, Charles Keeling measured CO2 concentrations at the Mauna Loa Observatory in Hawaii, now known as the "Keeling Curve" and in 2006, a stamp depicted his accomplishment.
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