The relationship between the trend of CO2 and the trend of
the global average temperature has changed FOUR times since 1910 !
1910 to 1940
-- CO2 barely changed,
- temperature up
weak positive correlation
1940 to 1975
-- CO2 up,
-- temperature down
strong negative correlation
1975 to 2003
-- CO2 up,
-- temperature up
strong positive correlation
2003 to mid-2015
-- CO2 up,
-- temperature unchanged
no correlation
Mid-2015 to 2021
-- CO2 up,
-- temperature up
strong positive correlation