The study questions electric vehicle’s environmental record, considering the greenhouse gases emitted during EV manufacturing. It points out that while EVs have no tailpipe emissions, they charge on U.S. electric grids that draw 50 percent of their power from coal. The Fact Brief also casts doubt on the practicality of EVs for public and private fleets, citing the technology’s struggles with limited carrying capacity, limited driving range and the high cost of their charging infrastructure. The study warns that experts believe an increase in EVs could overburden an already strained electric grid.

While electric vehicles hold many benefits over vehicles running on traditional fuels, the Fact Brief encourages consumers to consider other alternative energies which have more verified environmental and economic benefits and a proven record in American fleets.

With the introduction of the Chevy Volt and the Nissan Leaf to the consumer market this year, electric vehicle (EV) manufacturers have ramped up advertising campaigns claiming these vehicles produce “zero emissions.” Nissan started with its Polar Bear ads, featuring a morose polar bear wandering away from its melting arctic habitat, winding up at the home of a Leaf owner, giving him a hug for going green.

The automaker even created a website named “Nissan – Zero Emission.” The image below is among the various rotating headers on the site. Are plug-in EVs really “Zero CO2″ emitters? We’ll answer that in a bit.

Nissan claims the Leaf is emissions-free

Next, Nissan asks us to imagine what the world would be like if everything was powered by gasoline. From alarm clocks to iPods to computers, the video shows us how dirty the air around us would become if it wasn’t for electricity. Renault, which has four EV models in production in Europe, created a similar ad.

None of these ads or websites makes it clear what actually sources the electricity to charge the car, however. Is it wind? Solar? Natural Gas?

Automakers are trying to define “zero emissions” vehicles as those that produce no “tailpipe emissions” in an effort to brand EVs as the greenest cars on the market. This is only part of the story, unfortunately. The following chart shows which fuels make up the average U.S. electricity grid mix.

Of course, the fuel mix for any particular region will vary, but this chart represents the average percentage of electricity sources used in America. In fact, according to the EPA, there were 24 states that used coal for 50% or more of their electricity fuel mix as of 2007.

We know we don’t have to tell you that an electric vehicle powered 50% by coal obviously isn’t a zero emissions vehicle. As more electricity comes from renewable and clean-burning sources like wind or natural gas, then PEVs can move toward becoming the environmental holy grail that manufacturers want them to be.

Welcome to Alternative Fuel Facts, where we plan to clean up the alternative fuels industry.

You see, we’ve realized that there’s a lot of misinformation floating around the internet about various alternative fuels. Industry stakeholders sometimes exaggerate the viability of and downplay the uneven playing field for technologies and fuels like natural gas (CNG), ethanol, electric vehicles, hydrogen, biodiesel, and so on.

“You mean corporations and politicians may have been embellishing the facts and figures about things that are supposed to help us?” Why, yes, it’s true.

Before you go all “you’re just saying this because you’re a front for big, bad company” on us (which we’re not), let us clear the air:

• We are not trying to say that these fuels don’t have their place in the market at all. They do. Each alternative fuel and technology has its place, has an application or applications for which it’s a great solution.
• We are advocates for propane autogas used in light- and medium-duty vehicle fleet applications, because it’s the most effective, readily-available, affordable solution for these applications.
• We think it’s ridiculous for someone to slap a “Zero Emissions” sticker on the side of an electric vehicle (EV), because it simply isn’t true. Where do they think the energy for EVs comes from?

Through our extensive research and experience in the alternative fuels industry, we’ve realized how little the general public actually knows about some of the most hyped technologies around.

• Did you know that electric vehicles like the Chevy Volt and the Nissan Leaf will be powered by electricity generated from, on average, 50% coal? And it ain’t the mythical “clean coal” variety either.
• Did you know that despite CNG having a cheap per-gallon sticker price, we’ll have to fork over $1 million+ for each fast-fill fueling station in order to fuel a (very expensive) natural gas vehicle?
• Did you know diesel fuel, chemical fertilizers, pesticides, coal-powered processing plants and oil are all parts of the process of making supposedly ‘green’ corn ethanol?