Despite increasing atmospheric CO2, the global temperatures have recently shown a gentle decrease. Increasing CO2 is not without its problems such as acidification of the seas. It doesn't however seem to have had any upward pushing effect on world temperature .
The importance of the graph above lies in the fact that if CO2 was having a significant warming effect, the troposphere where it resides would have to show warming. It clearly does not.
Meanwhile, the possible prime controller of our temperature, the sun, continues to remain in an unusually quite state with a protracted absence of spots. The last time the sun had a period of inactivity of this duration was in the early nineteen tens. A century ago.
No spots means a reduced solar magnetic field reaching out to deflect from the earth deep space cosmic rays that seed clouds that in their turn cool the planet. The last time there was a major period of solar spotlessness ( the Maunder Minimum in the 17thC ) the Thames froze over.
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