The energy equation for EVs is far less favorable than the one for gas powered vehicles.
Says who? Links please.
Electric Vehicle Efficiency Analysis
EV Emissions aka The Long Tailpipe
EVs have no tail pipe and emit no polluting gasses when driven, but they do increase load on the grid, which in turn causes more emissions at polluting power plants. This is often called the long tailpipe. How much comes out of that tailpipe depends on how the power plant is fueled.
The most interesting question for US consumers considering an EV purchase is how much pollution is created by electric production in the US. A 2007 Department of Energy study found two interesting results.
In 2007, a DOE-sponsored analysis (PDF) found that there is enough excess off-peak capacity in today's electrical grid to power the conversion of "up to 84% of U.S. cars, pickup trucks, and sport utility vehicles (SUVs)" to plug-in hybrids with a 33-mile pure electric range. That's about 200 million vehicles. So, we don't need to build any new power plants to handle many years of EV production.
That same study found that under that scenario overall greenhouse emissions would decrease by up to 27%. Emissions of volatile organic gases and carbon monoxide would drop over 90%. Without improving generation technology, particulate and SOx emissions would increase, but we have a lot of time to solve that problem. It's a lot easier to solve a pollution problem at a few hundred power plants than it is with hundreds of millions of tailpipes