Old Rocks
Diamond Member
And 1200 years ago it was significantly warmer than it is today and recent Geological studies indicate that was a world wide impact not just a European affair as they were growing grapes in northern German and grapevines grew wild as far north as Nova scotia hence the term Vinland. And sea levels if anything were slightly lower. CO2 isn't the prime mover or even a close second. We don't have enough extra CO2 in the air to explain The more than doubling of the human population since 1950 and the huge increase in the number of herd animals and attempts to explain that as with the trivial well living thiongs just stay in balance is freaking silly.
Once again, a lot of statements with absolutely no data. Here is what the National Academy of Sciences has to say;
Surface Temperature Reconstructions for the Last 2,000 Years