Hey Mr. Green,
I keep hearing hype about how hybrid cars are so much better for the environment, yet I also hear that the process to make the batteries for them is very toxic. If so, the Toyota Prius isn't a very green car, so I won't be wasting the extra cash to damage the planet. Is this a wise choice?
--Jacque in Missoula, Montana
The fuss about Prius batteries is because they're made of nickel. Thirty years ago, Canada's nickel-mining industry was particularly toxic, but our northerly neighbors have since cleaned up their mining mess. Only a fraction of the world's nickel is used for batteries, and those made for Priuses (Prii?) are recyclable. For a fuller refutation of this and other myths about the Prius, go to tinyurl.com/mrgreenprius.
However, don't rush out to buy a $22,000 Prius unless you have unlimited funds. You might net greater energy savings by purchasing a cheaper but still-efficient car--like a Toyota Yaris--and investing the money you save in less-sexy energy-conservation measures like replacing your furnace, upgrading your insulation, and installing fluorescent lights, programmable thermostats, an Energy Star fridge, and so on. Sure, the furnace and insulation won't sit in your driveway and flaunt your environmental rectitude. But they could reduce more emissions and save more money in the long run. Consider your energy habits and where you live, and do a basic energy inventory using some simple math.
Say you drive 10,000 miles per year, mostly on the highway. The Prius is rated at 45 miles per gallon (highway), so it'll burn 222 gallons a year. If gas is $2 per gallon, you'll pay $444 per year for fuel. The efficient little Yaris gets 35 mpg, so it'll burn 286 gallons annually, costing you $572. The Prius, then, will save 64 gallons and $128 per year and emit 1,250 fewer pounds of carbon dioxide. But its base price is almost ten grand more than the Yaris.
By choosing the Yaris over the Prius, you'll have an extra $10,000 to spend on planet-preserving home upgrades that will save more energy than the Prius. Of course, if your home energy use is far less than average but you drive far more--or if gas prices climb back to the $5-per-gallon range--the equation changes.


Wow, this is REALLY helpful! It's great to have a way to quantify the differences in mileage, etc.
I also am glad to hear about the battery explanation, because I had heard that objection too.
Could you further empower us by telling us how to calculate the emissions differences? Is it really complicated?
Thank you!
Posted by: Laura Bush | June 17, 2009 at 05:48 AM
For that extra $10,000, you get a much bigger car, a much more comfortable car, and a car which USES LESS GAS. Individula economics are not the entire issue. Yes, get energy efiicient appliances, and lighting, and furnaces. But, so far, the hybrids are the best choice to USE LESS GAS, and to ride in a fairly comfortable, roomy car.
Posted by: Jack Moore | June 17, 2009 at 03:01 PM
I was really irked by this column. Mr. Green makes a lot of assumptions here, including that the person in question does not have any children.
We made the decision between a minivan and a Prius for our family of four. THe benefits to the environment and our wallet in this instance are quite clear. The Yaris was not a viable option for us.
Also, to say that one should only buy a Prius if they have unlimited funds is ridiculous. THe base price for a new 2010 Prius is $21,000. Again, if the choice is not between a Yaris and a Prius but between a Prius and more "traditional" (in the US) large family cars, in some cases the Prius is much cheaper initially and going forward (efficiency more than two or three times your standard minivan means a lot of gas savings).
Posted by: Laura | June 29, 2009 at 05:35 AM
As a Prius owner, I have to take exception to your analysis and recommendation to buy a Yaris just to save the money – even if the money saved would be spent on other energy-saving home improvements. Most people, who purchase a Yaris, do so because they do not have that extra $10,000 spare. Many people, I have spoken to, don’t consider buying a Prius because they have many misconceptions about its performance and reliability. There is also the tendency to buy a car by the pound – a bigger car for the price of a Prius.
After driving the Prius for three years, I can tell you that this car gets 42 MPG in short distance city driving and on two recent trips – 410 miles and 180 miles – the highway mileage was 59 MPG. They way I achieve that kind of mileage is to keep my tires inflated to specifications, use cruise-control where traffic and highway conditions allow and drive at or slightly below the 65 MPH speed limit – 65 MPH is too fast for safety and fuel economy for most cars. Because of the Pius’s low drag coefficient, it actually does get good mileage at 65 MPH.
I think the equation has changed in favor or the Prius – please recalculate.
Posted by: Ron Bourque | July 01, 2009 at 10:00 AM
I have another question. I just heard that the Prius battery lasts 4-5 years and costs $6,000 to replace. Is that accurate?
Posted by: Laura Bush | July 02, 2009 at 05:41 AM
Yaris is a subcompact. Prius is a midsize with a hatchback with over 39 cubic feet of utility too. Prius is much safer with stability control, 4-wheel disc brakes with brakeforce distribution, knee airbag, etc. Prius pollutes much less while driving or sitting at stop lights or in traffic. And, gets far better fuel mileage. Come on Answer Guy, compare an apple to an apple.
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