It should be noted, however, that the crucial Danish work on this subject was published by Henrik Svensmark and Eigil Friis-Christensen in 1997, with Svensmark properly named first because of his key role in the discovery. If your answered day, afternoon, summer, and cloudless you may be well on your way to understanding what is causing global warming. You may also already know more about the subject than the phalanx of United Nations and Government of Canada scientists who have lately been frantically warning about greenhouse gases. It doesn't require a genius IQ to figure out it usually gets no hotter than mid-afternoon on a clear summer's day, nor to figure out why. It's the sun.
Solar radiation absorbed by plants permits photosynthesis.
The energy stored in coal and oil originates in the sun. Air masses move and rain falls because of solar radiation. I can't help thinking their motives are political. Government can't control the sun. Most government climate scientists are suspcious of the free market and generally leery of industry.