​CORRECTIONS:

1) At around 15:00 I give the atmospheric content of CO2 as 32 billion. This is actually our annual contribution. The total is much higher, around 3,290 billion tonnes — i.e. 3.3 trillion tonnes.

2) At 23:00 I say the rise in CO2 is shown in red. I should have said ‘shown in blue.’ Temperatures are shown red, CO2 blue.

3) The link between CO₂ and global temperature was first published in 1856 by Eunice Newton Foote, not Arrhenius. Arrhenius quantified it.

4) Spencer doesn’t give a time period for the ‘natural air conditioning system’ he ‘feels’ (yes, he does use the word ‘feel’) it will kick in some time and cool things down again. So I was wrong to say ‘soon.’

5) Ljunqvist’s reconstruction was for NH temperatures, so I should not have added in global temperatures and compared them to the medieval Warm Period. It’s a shame I didn’t spot this mistake sooner (my thanks to bacchusevokution for pointing it out), because the NH temperatures are higher still.

Sources: https://youtu.be/HhAX42dT09w

potholer54