It's the CO2 not the sun.....  

A 2013 study estimated that a solar storm like the Carrington Event could take a $2.6 trillion bite out of the current global economy.

Massive bursts of solar wind and magnetic fields, shot into space on July 23, 2012, would have been aimed directly at Earth if they had happened nine days earlier, Luhmann said.

The bursts from the sun, called coronal mass ejections, carried southward magnetic fields and would have clashed with Earth's northward field, causing a shift in electrical currents that could have caused electrical transformers to burst into flames, Luhmann said. The fields also would have interfered with global positioning system satellites.

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http://www.nbcnews.com/science/space/close-call-destructive-solar-blasts-narrowly-missed-earth-2012-n57011