2. Who and when did they discover global warming?
In 1859, the Irish John Tyndall (1820-1893), another ahead of his time, discovered that CO2, methane and water vapor trap infrared radiation, a component of solar rays, providing a relatively stable temperature to the Earth. This characteristic was what allowed the expansion of life on our planet.
Svante Arrhenius (1859-1927), a Swedish scientist, proclaimed in 1896 that fossil fuels could accelerate the warming of Earth and established a relationship between concentrations of atmospheric carbon dioxide (CO2) and temperature. He suggested that a double concentration of CO2 would cause a temperature increase of 5 °C, due to its absorption capacity of infrared radiation, along with water vapor. This was an important step towards demonstrating the greenhouse effect theory.
Thomas Chrowder Chamberlin, developed in 1899 in detail the idea that changes in climate could be the result of variations in the concentration of carbon dioxide in the atmosphere. In the following decades the presumptions of Arrhenius and Chamberlin were poorly estimated, because it was thought that CO2 did not influence the temperature of the planet, and the greenhouse effect was attributed exclusively to water vapor.