A report of the Ad Hoc Study Group on carbon dioxide and climate for the National Research Council chaired by Massachusetts Institute of Technology meteorologist Jule Charney estimates “the most …
Jul 1979 Read More →
Exxon Warned
Senior Exxon Corporation scientist James F. Black advises Exxon’s Management Committee that CO2 from the world’s use of fossil fuels would warm the planet and could eventually endanger humanity At …
Mar 1977 Read More →
Keeling Curve
1976 Charles D. Keeling creates the “Keeling Curve,” a simple visualization of the longest continuous record of CO2 concentration in the world. A paper published by Charles D. Keeling of the Scripps …
Dec 1976 Read More →
Presidential Acknowledgement
1965 President Lyndon Johnson states in a Special Message to Congress, “This generation has altered the composition of the atmosphere on a global scale through … a steady increase in carbon …
Feb 1965 Read More →
First Mention
1965 Roger Revelle contributes to the first mention of global warming in a government report, drawing an analogy between human-produced gases entering the global atmosphere and the effect of glass …
Jan 1965 Read More →
Oceanographers’ Proof
1957 American oceanographers Roger Revelle and Hans Suess demonstrate that CO2 levels in the air have increased as a result of the use of fossil fuels Roger Revelle and Hans Suess …
Jan 1957 Read More →
Plass Published
1956 The New York Times publishes a summary of the Gilbert Plass paper headlined “Warmer climate on the earth may be due to more carbon dioxide in the air” The …
Oct 1956 Read More →
Plass’ Theory
1956 Canadian physicist Gilbert Plass publishes a lucid explanation of “carbon dioxide theory” to account for “the general warming of the climate that has taken place in the last sixty …
Jul 1956 Read More →
Emissions Estimation
1938 English engineer and amateur meteorologist Guy Callendar concludes that humans have added about 150,000 million tonnes of CO2 to the air over the previous 50 years “The artificial production …
Jan 1938 Read More →
Temperature Prediction
1904 Swedish scientist Svante Arrhenius concludes that the Earth’s temperature might increase by 5 to 6 degrees Celsius with a doubling of atmospheric CO2 Nobel Laureate Svante Arrhenius follows early …
Jan 1904 Read More →