The concentration of carbon dioxide in the atmosphere on Oct. 20 was 398.48 parts per million (ppm). The more CO2 in the atmosphere, the warmer we get.
One year ago = 395.58 ppm
1958 = 318 ppm
800,000 years ago = 260 ppm
It was announced on Oct. 22 that scientists expect 2015 will finish as the warmest year on record. The previous warmest year was ….. last year.
