[Moseley]

“There are other proxies they don’t mention showing thousands of years of lower CO2.”

And how have those proxies been VALIDATED?

To know if the proxies accurately measure past conditions, you would have to climb in to a time machine, go back in time, measure the actual air in the past, then come back in your time machine to the present, and then re-measure the proxy.

On what basis would anyone speculate that a proxy is an accurate measure of CO2 content in the atmosphere.

“Those are inexact just like the ice cores.”

That would lead to the conclusion that they are worthless.

[palmer]

To know if the proxies accurately measure past conditions, you would have to climb in to a time machine,

You grow the same plants in a chamber with controlled CO2 and measure the stomata numbers and sizes.