[Swordmaker]

when both global average temperature and sea level were significantly higher than today.

Let me remind them: “Correlation does not equate to causation.”

[stylin19a]

thanks. There's no backup to that statement and I wonder how they could possible make it much less release it. To me it blows up anything they have to say about CO2.
In reading through this document ( trust me, I read it in almost pure ignorance ), it makes so many claims with so many suppositions that it seems worthless as an authoritative reference on climate.