Posted by:
Brother Of Jerry
(
)
Date: August 15, 2018 08:47AM
I for the life of me can't tell whether tumwater's last sentence about population growth having no effect is meant ironically, or if the poster is actually serious.
In the off chance poster was serious, here's the 60 years of standardized observations of co2 concentrations at the Mauna Loa Observatory in Hawaii, still the gold standard of CO2 measurements.
https://www.esrl.noaa.gov/gmd/ccgg/trends/full.htmlFor geologic perspective, over the last 800,000 years or so, based on analysis of air bubbles in glacial ice cores, the earth's CO2 level has oscillated between 170 ppm during glacial periods to 270 ppm during warmer interglacial periods.
The earth started climbing above that in the mid 1800s, about the time of the US Civil War. It was 315 in the late 1950s when Mauna Loa came online. Now we are consistently above 400, and still climbing. Human population growth and the industrial revolution is responsible for most, if not all of that truly exceptional spike in CO2 concentrations over the last 150 years.
Somebody give Hie a hug.