Paul Burgess uses history & ocean heat to track low clouds in the Northern Hemisphere.

His conclusion is warmer oceans caused by the sun & things like El Nino, lead to less low-level clouds & more heat.

He accepts that mankind has increased CO2, but not heat because past "recent" warm periods had the same 280 ppm.

Only 2.4% change in low-level clouds equals CO2 heat changes according to him, if I understand correctly.

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