Climate Change Versus CO2 Capture Technology (Blogcritics.org) According to an American Bar Association (ABA) newsletter on energy , CO2 concentrations in the atmosphere are rising at 2 parts per million (ppm) per year (the newsletter article cites: The discovery of Global Warming). On a comparative basis in the 1700s, CO2 in the atmosphere was at 290 ppm; in 1960 the concentration was at 315 ppm, and it has increased to 370 ppm today. The threshold to [News Source]