“The IPCC indicated in its fourth assessment report that achieving a 2 C target would mean stabilizing greenhouse gas concentrations in the atmosphere at around 445 to 490 ppm CO2 equivalent or lower. Higher levels would substantially increase the risks of harmful and irreversible climate change.” –Johan Eliasch
(NOAA’s greenhouse gas index shows that CO2e concentration for 2015 averaged 485 ppm. Given recent rates of rise, the 2016 average should be near 490 ppm CO2e. At the latest, this key threshold will be crossed some time during 2017. Image source: NOAA’s Earth Systems Research Laboratory.)
There are a few things we know about climate change that should really keep us up at night. The first is that the world is warming, and this warming of the Earth, in so many ways, is dangerous to human beings and all the other innocent creatures living here.
The second is…
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