Our world is at a turning point; revolutions are happening
everywhere, and the push for change is in the air. Yes, change is
literally in the air. Human activity is causing carbon in the
atmosphere to increase about 2 ppm per year. We are now at 393
ppm (430 ppm plus if you include other pollutants like methane in
the atmosphere,) so if we continue with business as usual, it
won’t be too long until we’ve reached 450 ppm. According to James
Hansen, head of the NASA Goddard Institute for Space Studies, 450
ppm would correspond to a temperature increase of six degrees