QUESTION: Dear Martin,
I was browsing through the website of NASA and came across a graph (see attachment).
It shows the temperature differences between 1880 and 2012. As far as I can see there seems to be a +/- 40-year cycle. I have edited it with the red vertical lines. The end of the current 40-……………………..
https://www.armstrongeconomics.com/world-news/climate/climate-change-the-43-year-cycle/