See on Scoop.it – PRG HAWAII NEWS WITH RUSS ROBERTS
Recently, CO2 levels touched 400 ppm in Hawaii – the last time they were this high, humans did not live there. (CO2 levels touched 400 ppm in Hawaii – the last time they were this high, humans did not live there.
Russell Roberts‘s insight:
The warning is out, thanks to data collected on the slopes of Mauna Kea. This is the highest reading for carbon dioxide in several millions of years. "The last time they were this high, humans did not live there." Sobering thought. Aloha, Russ.
See on beta.dawn.com