I find the lack of numeracy in this criticism disconcerting. It's not just a question of whether the Earth has been historically warmer or cooler - it's a quest

I find the lack of numeracy in this criticism disconcerting. It's not just a question of whether the Earth has been historically warmer or cooler - it's a question of how quickly the Earth became significantly warmer or cooler. A temperature change over thousands of years is a tremendously different thing than a temperature change over a few decades, when it comes to how temperature-sensitive life forms respond. Moreover, it's not just a question of temperature. Changing CO2 levels are also measurably impacting ocean acidity, which affects extremely sensitive single-celled life forms at the root of the ocean's food chain.