This is suppossed to be a scholarly article. Sunspots affect earth's climate by inhibiting cosmic rays from the galaxy from forming clouds not by the miniscule 0.1% more energy.
The writer of the article put that in to sound intelligent and make anyone who didn't know anything believe that sunspots have no effect on climate and the global warming is all caused by MAN (cue evil music).
How difficult is it? The SUN and other natural factors such as volcano's affect earth's climate more than man does.
Man is the only creature that worries about the weather, yet isn't smart enough to come in out of the rain.