By Adrian Parr
In 2010 the world emitted 38.1 billion tons of carbon dioxide (CO2). This is 48 percent more CO2 than in 1992, and 6.7 percent more than in 2009.1 In 1979 average atmospheric CO2 was 337ppm, in 2000 it grew to 369ppm, and on May 13, 2013 the Hawaii monitoring station recorded a daily level average of CO2 of 400ppm. The safe zone is 350ppm or less. Below, Adrian Parr discusses how the earth’s climate system is reacting.






























































