Average local CO2 levels capped at 2 parts per million by photosynthesis on land and sea. In the Arctic winter air temperatures hit -50oC. With local CO2 AT 4 PARTS PER MILLION.
The global average in the little ice-age – as shown my mineral and ice strata. Global Warming thought up by nuclear stooges after Chernobyl.
The global climate has natural 28 year warming and cooling periods. We entered a natural cooling phase in 1995 – dictated by predictable solar cycles. Facebook https://www.facebook.com/Climate-Sorted-by-nature-628838150564539/