The Dictionary of the Climate Debate (DCD)

Callendar, Guy

(1898 - 1964) He was an English steam engineer and inventor who — expanding on Svante Arrhenius' work — was the first person to theorize that rising industry-caused atmospheric CO2 levels could lead to global warming. This became known as the Callendar Effect. In the 1930s he became one of the first people to notice and publicize that this CO2 increase was already happening.

His place in a proponent's history of climate

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