At a fairly low level of CO2 in the atmosphere, the gas reaches it’s saturation point in terms of its effect on the climate. In other, more CO2 produces no additional climate effects. From Frank Bergman at slaynews.com:
A bombshell new peer-reviewed study has provided conclusive scientific evidence proving that carbon dioxide (CO2) emissions in Earth’s atmosphere cannot cause “global warming.”
Dr. Jan Kubicki led a group of world-renowned Polish scientists to study the impact of increases in CO2 emissions on the Earth’s global temperatures.
However, not only did they find that higher levels of CO2 made no difference, but they also proved that it simply isn’t possible for increases in carbon dioxide to cause temperatures to rise.
Kubicki and his team recently published three papers which all conclude that Earth’s atmosphere is already “saturated” with carbon dioxide.
This saturation means that, even at greatly increased levels of CO2, the “greenhouse gas” will not cause temperatures to rise.
Kubicki et al. summarize their evidence by noting that as a result of saturation, “emitted CO2 does not directly cause an increase in global temperature.”
Current levels of CO2 in the atmosphere are around 418 parts per million (ppm) but the scientists state that past 400 ppm, “the CO2 concentration can no longer cause any increase in temperature.”
STRAIGHT LINE LOGIC 
Do their records go back to Krakatoa?
It wasn’t that long ago back in 1883.
Wouldn’t one massive volcano eruption just destroy their garbage in garbage out models?
Or the reading stations on tarmacs and the tops of buildings during the summer?
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