Thirty years ago, on this day, May 19, 1993 Senator David Boren comes out against BTU tax, after Burson Marstellar astroturf campaign (see Agrawala and Andressen, 1999: 470) The amount of carbon dioxide in the air was roughly xxxppm. As of 2023 it is 420ppm, but check here for daily measures. The context was There […]