Global temperature anomalies for 2015 compared to the 1951–1980 baseline. 2015 was the warmest year in the NASA/NOAA temperature record, which starts in 1880. It has since been superseded by 2016.
To understand climate change you just need basic physics and mathematics. The physics works like this. The earth’s surface temperature is governed by the absorption and emission of thermal radiation, and greenhouse gases (GHG) like CO2 and CH4 (methane) trap thermal radiation making the earth’s surface warmer. The mathematics is even simpler. Continue reading The Prisoner’s Dilemma and Climate Change