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Employment report: Solar employs more than coal, oil, and natural gas combined. Solar specifically employs the largest share of workers in the Electric Power generation sector.  Issues
As an aside: For the same amount of energy, coal produces more greenhouse gases (CO2) than gasoline. So, if your electricity is generated form coal (which is common), a fuel cell powered or electric car will probably produce more greenhouse gases than a gasoline powered car (of the same size, power, etc).