Forum Discussion
rexlion
May 19, 2018Explorer
Perhaps a correlation can be observed between CO2 levels and temperatures in the very short term. But an honest scientist knows that correlation does not prove causation. Our planet's environment is multi-faceted and many factors affect it. It is entirely possible (if not probable) that larger trends in climate are due to solar radiation upon the earth. For one thing, the sun's output and sunspot activity wax and wane in a cyclical fashion. For another, the earth's path around the sun varies cyclically from near-circular to elliptical.
If one looks at the graph cited, the temperature difference is really quite small but the graph uses a short vertical interval to increase the apparent scope of the change. And unfortunately, even the accuracy of the graph could be questioned since the data is sometimes 'adjusted' according to pre-conceived notions to negate results which appear unexpected or anomalous. Moreover, the length of time displayed in the graph is relatively short in terms of earth's climate history. A more lengthy time line may show something entirely different.

During the Ordovician Period ice ages, obviously (considering the ice) it was much colder overall on the planet than it is today. Yet it is believed that CO2 levels were in the thousands of parts per million (versus 300 or 400 ppm in recent times). If high CO2 levels cause global warming, the ice ages should not have occurred when they did.
If one looks at the graph cited, the temperature difference is really quite small but the graph uses a short vertical interval to increase the apparent scope of the change. And unfortunately, even the accuracy of the graph could be questioned since the data is sometimes 'adjusted' according to pre-conceived notions to negate results which appear unexpected or anomalous. Moreover, the length of time displayed in the graph is relatively short in terms of earth's climate history. A more lengthy time line may show something entirely different.

During the Ordovician Period ice ages, obviously (considering the ice) it was much colder overall on the planet than it is today. Yet it is believed that CO2 levels were in the thousands of parts per million (versus 300 or 400 ppm in recent times). If high CO2 levels cause global warming, the ice ages should not have occurred when they did.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,369 PostsLatest Activity: Mar 12, 2026