Take Part: The Mauna Loa Observatory sits atop a hillside on the big island of Hawaii. And while that sounds as if it must be a place of calm and tranquility, on May 10, it became the worlds messenger of doom.
Using its tracking equipment, the observatory recorded that the average amount of carbon dioxide in the atmosphere exceeded 400 parts per million (ppm) for the first time in 55 years of measurement--and quite probably the last 3 million years of Earths existence.
Carbon dioxide (CO2) is the primary...