“CO2 levels are now at historic highs”
Simply not true
Actually, it is true. According to the Antarctic ice core data CO2 levels spiked just short of 300 ppm the last three inter-glacial maxes. We are above 400 ppm now. The point is, that is not causing temps to increase accordingly. As the ice core data also shows, CO2 levels are a lagging indicator, not a leading indicator.
Simply not true
Semantics. Historic means within recorded history. When were CO2 levels first recorded, and what were they? They may (or may not) be higher now. But they want you to believe that they are the highest in the history of the planet, when in fact they were several orders of magnitude higher when all those plants were living that became the huge coal deposits found worldwide.