Nils Gustaf Ekholm

Nils Gustaf Ekholm (9 October 1848 – 5 April 1923) was a Swedish meteorologist. He led a Swedish geophysical expedition to Spitsbergen in 1882–1883.
In 1899 Ekholm pointed out that, at present rates, coal burning might eventually double the concentration of atmospheric CO2.
Ekholm was a friend of Svante Arrhenius, who first predicted that burning coal would raise the global temperature.