Ok, we'v HAD this duscussion before. Even coal fired electric plants are vastly more efficient at producing energy vs pollution, and using them vs gasoline powered cars reduces automotive related pollutants (including the pollution created at the plant) by over 80%. It's easier to clean and regulate a few centrally located sources of pollution than millions of indiscriminately maintained point sources.
Secondly, electric plants currently have to ramp down and ramp back up again during off peak hours, and are thus less efficinet than they could be. A california study showed that by using smart meters to allow off peak recharging would allow for the replacement of most of the current automotive fleet there without adding a single powerplant. AND the grid would be more efficient due to not having to ramp the power plants down and up.
Even when transmission and charging losses electrics are still nearly twice as efficient as fossile fueled powered vehicles with the same level of performance.
lastly, the only way for there to be a strain on the current grid would be to replace most of the existing fleet all at once. The entire US fleet is 200 million plus vehicles. Even if every manufacturer switched over to 100% electric car production, at current manufacturing ability, it would take a couple decades of new car sales to replace the fleet. At NORMAL replenishing rates, it would take 30+ years to do so. Please, don't act like the entire fleet could be replaced overnight, or that the infrastructure would have to be changed overnight to accomodate said replacement. Considering how long it will take to replace the fleet just in America, I think we'll have more than enough time to upgrade the grid to handle it.
Froma couple years ago:
'In California, where over half of the state's pollution comes from ICE vehicles, the overall mix of power plants is one of the cleanest in the country. Power plants burning cleaner fuels, such as natural gas, account for a major share of the state's electricity. In fact, natural gas facilities in California emit 40 times less NOx than existing coal plants in the Northeast (2). Renewable sources such as hydro, solar, wind, and geothermal produce a respectable share of the electricity generated in California.
Taking advantage of California's abundance of sunlight, several utilities are using Solar Charge Ports to charge EVs. Charge Ports are facilities that have an array of solar panels placed strategically on the roof of the structure. The solar panels convert sunlight into electricity where it is distributed to the vehicles or the adjacent building's power supply. On cloudy days, the building supplies the electricity to charge the EVs. Charge Ports are in operation in several cities in California including Diamond Bar, Azusa, and Santa Monica.
Because California has a mix of cleaner fuels and renewable sources, several studies have concluded that improvements in air quality can be achieved easily by plugging in to EVs.
The California Air Resources Board (CARB) estimates that EVs operating in the Los Angeles Basin would produce 98 percent fewer hydrocarbons, 89 percent fewer oxides of nitrogen, and 99 percent less carbon monoxide than ICE vehicles.
In a study conducted by the Los Angeles Department of Water and Power, EVs were significantly cleaner over the course of 100,000 miles than ICE cars. The electricity generation process produces less than 100 pounds of pollutants for EVs compared to 3000 pounds for ICE vehicles.
Many EV critics remain skeptical of such findings because California's mix of power plants is relatively clean compared to that in the rest of the country. However, in Arizona where 67 percent of power plants are coal-fired, a study concluded that EVs would reduce greenhouse gases such as CO2 by 71 percent.
A study conducted by the Union of Concerned Scientists found that EVs in the Northeast would reduce CO emissions by 99.8 percent, volatile organic compounds (VOC) by 90 percent, NOx by 80 percent, and CO2 by as much as 60 percent.
According to the Northeast States for Coordinated Air Use Management (NESCAUM) study, use of EVs results in significant reductions of carbon monoxide, greenhouse gases, and ground level ozone in the region, with magnitudes cleaner than even the cleanest ULEV."
And more to the point on how many power plants we need...
'Many critics ask how this country could possibly support millions of EVs on today's existing power grid. The Electric Power Resource Institute (EPRI) estimates that this country has the ability to support 50 million EVs without building any more power plants. Another study puts this number closer to 20 million. Even so, 20 million EVs is only 10 percent of today's fleet of nearly 200 million cars. Thousands more could be added if they are charged at night during off-peak hours. Twenty million EVs, each with 100,000 miles on the odometer, would reduce CO2 emissions in this country by 500 million tons without building more power plants.
Southern California Edison (SCE) estimates that it has enough off-peak capacity to refuel up to 2 million cars, 25 percent of the area's automobiles. SCE estimates it will only need to add 200 megawatts of capacity by 2008 to accommodate EVs. "
And of course, as power production goes, tech right now is pretty close to reliable alternate fusion using plasma, with a couple new tokamaks being built. In the next couple decades, that power source could be viable.
Oh, and as someone lese mentioned:
"Furthermore, we already have an electric infrastructure- a major hurdle for other alternative fuels. To top it off, once all the cars are electric we can use a myriad of energy sources to provide the electricity. This shelters us from the volatility of special fuels like petro, and it allows huge numbers of drivers to take advantage of the latest power technologies right away instead of having to rebuild all the cars again. They're the ultimate in fuel flexibility!"