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Shea Gunther's Blog

Shea Gunther

The Prius-driving vegan vs. the meat-eating bicyclist: Who is the better environmentalist?

Environmentalists come in all kinds of lovable varieties. But what really matters is who's the best?
Thu, Feb 04 2010 at 7:41 AM EST
Read more: CLIMATE CHANGE, ENVIRONMENTALISM, HYBRID CARS, VEGETARIANISM & VEGANISM

Photo: jhritz/Flickr
A note from Shea: I'm out-of-pocket this week, working on a project in Iowa and I've asked a few of my green blogger friends to help me by writing some guest posts. Enjoy this piece from MNN's Bryan Nelson. I'll be back in action next week.
 
Related on MNN: Should I drive my Toyota?
 
Several months ago food author and all around eco-guru Michael Pollan was caught making the claim that "a vegan in a Hummer has a lighter carbon footprint than a beef-eater in a Prius.”
 
The tantalizing comparison immediately made meme-waves across the environmental world. If he was right, it could finally vindicate vegans and vegetarians everywhere who insisted that anyone serious about being an environmentalist had to do more than just make responsible transportation choices. They had to give up their meat, too.
 
The only problem? Pollan was wrong.
 
It turns out that a study published out of the University of Chicago back in 2006 found that the difference between a heavy meat-eating diet and a vegan diet was, give or take, about 2 tons of carbon dioxide equivalent per person per year. Meanwhile, the difference between driving a Prius and a Hummer-sized SUV can be as much as 4.76 tons per year given average American driving habits.
 
In other words, Hummer drivers are still much bigger jackasses than meat-eaters, contrary to Pollan's claim.
 
Shortly after being corrected, Pollan (being the honorable journalist that he is) publicly retracted his quote. Environmentalist meat-eaters everywhere all slept a little better at night.
 
Unfortunately, the mix-up may have allowed the bigger point to be lost. The University of Chicago study didn't exonerate meat-eaters, except maybe in comparison to deplorable Hummer drivers. For instance, what if we tinker with the comparison slightly? Instead of using Hummer-drivers and Prius-drivers as a basis for comparing the environmental impacts of vegans and meat-eaters, let's compare a Prius-driving vegan against a meat-eating bicyclist.
 
In other words, a carbon-conscious transportation lifestyle might make up for the carbon-costly choice to eat meat when compared to the unholiest of Hummer-drivers. But how does the meat-eater match up against the more modest Prius driver?
 
The answer, in short: not so well. Using the University of Chicago study's calculations with the current EPA mileage statistics, a 2010 Prius getting 50 miles per gallon has a footprint of roughly around 1.4 tons annually. That means the Prius-driving vegan beats the meat-eating bicyclist by about half a ton in annual carbon impact.
 
Of course, the results can be tweaked. For instance, if you're the meat eater, it depends on the type of meat you eat, and how frequently you eat it. And regardless of your food preferences, the comparison depends on how the food was produced and whether or not it was delivered from a local source, etc.
 
Though even in a best-case scenario, the comparison should stay relatively close. And it gets worse for the meat-eater when generalized on a global level. According to U.N. data, meat production accounts for about 18 percent of worldwide greenhouse gas emissions compared to only 13 percent of emissions being accounted for by transportation. That includes all transportation: planes, trains, cars, and yes, Hummers too.
 
Now, I know a fair share of environmentalist-boasting bicyclists who still take pride in their carnivorous ways. While there's hardly anyone who could claim to be a perfect environmentalist (for the purposes of full disclosure, I'm a compact car-driving pescatarian), a moment of reckoning is probably in order for those of us who still make only minimal dietary choices.
 
And besides, it's a false dichotomy anyway. The vegan bicyclist bests us all.
 
Bryan Nelson is a science and environmental journalist, freelance writer and regular contributor to MNN. You can keep up with those contributions at his MNN profile, or you can follow him on Twitter.
 
 
Are you on Twitter? Follow me (@sheagunther) there, I give good tweets.
 
And if you really like my writing, you can join my Facebook page.
 
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Comments(19)

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Posted By Chris H - Tue, Mar 09 2010 at 5:01 PM EST

lol

You're both *******.

  • reply
Posted By Mmm... cow... - Tue, Feb 23 2010 at 6:35 PM EST

Meat-eating Hummer driver

In an ideal world, I would go for the best of both sides and eat meat and drive a Hummer. Unfortunately, a Hummer is out of my price range at the moment. My solution? Try to consume at least 3 different types of meat per day. I had bacon this morning, chicken for lunch. So that means a steak tonight. Sounds fantastic, right?

  • reply
Posted By Matt - Mon, Feb 22 2010 at 11:46 PM EST

One Less Prius!

One Less Prius! Bike riding is super awesome.

http://nowhip.blogspot.com/2009/07/one-less-prius.html

  • reply
Posted By Dan M - Mon, Feb 08 2010 at 12:01 AM EST

this is a stupid discussion

Bike riders are much better citizens than car drivers. It does not matter what they eat. Driving a Prius does not excuse one from anything. A car dependent society is unhealthy for everyone; meat is an essential protein that people have been eating forever. I personally do not eat much red meat, but this is besides the point. A greater focus must be put upon the idea of driving vs. biking. For example, a bike rider is probably healthier than a car driver because he is getting exercise,.... More

  • reply
Posted By Anonymous - Mon, Feb 08 2010 at 11:48 AM EST

IF the roads are safe!

Everyone seems to be assuming that the roads are safe to ride bikes. I walk my kids the 1/2 mile to school because there happen to be sidewalks, but the 3 miles to the public library or the short 1 - 1 1/2 miles to some shops have minimal sidewalks, NO shoulders, and steep ditches alongside the high-speed winding roads. There is NO WAY I'd ride my bike along those roads, or allow my children to do so. I don't care how safe we try to be as bicyclists, the simple fact is that motorists don't.... More

  • reply
Posted By Anonymous - Sun, Feb 07 2010 at 8:16 PM EST

Battery Production

What about all of the energy it takes to produce the battery for a Prius? The materials for the battery have to be mined, then shipped around the world before finally making it back to America. Where the battery is then shipped to be installed in the Prius, the cars are finally shipped to a selling location. The carbon footprint of the battery production needs to be taken into account if you are comparing carbon footprints. The footprint does not start when the consumer buys the car, it starts.... More

  • reply
Posted By Anonymous - Mon, Feb 08 2010 at 9:04 AM EST

many paths

I am a car driving meat eating man with a vasectomy who will produce no children to impact the future world. In the long term nothing produces less pollution than fewer people.

  • reply
Posted By Joe Shmoe - Mon, Feb 08 2010 at 9:13 AM EST

clipped

Amen, brother. I know my footprint is mine. No future generation of mine will be impacting the planet. We'll let all the "must have a baby" people worry about their ongoing footprint.

  • reply
Posted By Anonymous - Sat, Feb 06 2010 at 11:16 PM EST

Vegan shortsightedness

Veganism/Vegetarianism might get more interest if those who practiced it didn't act so infuriatingly superior. Also, I'm curious... if everyone stopped eating meat, what would happen to the cows? Would the vegans take them all in as pets or would we let them roam wild or just let them go extinct? They've been bred for centuries for meat and milk. How does this work? No one has explained this to my feeble evil carniverous mind.

  • reply
Posted By vegan - Sun, Feb 07 2010 at 12:48 AM EST

artificially insemination

shortsightedness is your comment, Animals that are raised for food are Artificially inseminated and live a life of misery,

Watch Earthlings the Movie for your shot of empathy

  • reply
Posted By hypatia - Sun, Feb 07 2010 at 4:35 PM EST

Missing the point

Artificial insemination is besides the point. If numbers of meat eaters start dropping quickly there will be more animals born into the supply chain then there is demand and there will be overpopulation.

They could just slaughter them regardless. They could be "rescued" but who really wants a bovine pasture ornament? It's hard enough to get people to take proper care of horses most of the time. You could also put them in a sanctuary, but who is going to pay for the care then? They will.... More

  • reply
Posted By Anonymous - Tue, Feb 23 2010 at 4:03 AM EST

Supply and demand

If people stopped eating cow (even all of a sudden), then they would stop artificially inseminating cows to produce the supply. As far as the cows that were already born: I'm sure the people "producing" them would find a way to make a buck off of them, just like some horse owners sell of their old horses to slaughter houses. Anything for a buck. It's sad.

  • reply
Posted By Lawrence - Sat, Feb 06 2010 at 3:09 PM EST

What about the footprint of car/bike production?

A 2010 Prius is a new car. That means when you're calculating its footprint, you have to take into account the energy that went into its production, not just the fuel used while driving.

I don't have any hard numbers, but I'm going to suspect that more energy goes into producing a Prius than a bike, just due to sheer complexity.

  • reply
Posted By Thinkr - Sat, Feb 06 2010 at 6:40 AM EST

Government, the biggest problem

Better than both would be to fight for the retraction of all laws that pay farmers to leave half their land fallow, since this law forces farmers to pollute the water supply by using heavy doses of pesticides.

Unfortunately, once passed, bad laws are almost never vetoed, so the government-forced pollution continues.

  • reply
Posted By August M. - Sat, Feb 06 2010 at 3:08 AM EST

Vegan Bicyclist

Cheese was hard to give up but there are some great alternatives out there! Love the Environmental Savings and the vindication but I weigh the Ethics of my dietery choices heavily too on my rides when I see a cow I know I didn't butcher its cousin.

  • reply
Posted By tr33 - Sat, Feb 06 2010 at 1:39 AM EST

YYYYeeeaaa

I am a proud vegetarian (I can't give up cheese!) cyclist.

  • reply
Posted By Anon - Fri, Feb 05 2010 at 10:37 PM EST

Production costs

The meat-eating bicyclist has something else significant on their side though. You're not factoring in the costs of producing the Prius vs the bicycle over their potential lifespans. The energy that goes into refining the materials that make up the two, mining those materials, batteries that need to be replaced in the Prius, the energy that goes into making them, maintenance, etc.
If you factor all of that in, your bicyclist is going to be looking much better.
Private.... More

  • reply
Posted By James M. Dow - Fri, Feb 05 2010 at 8:25 AM EST

The Prius-Driving Vegan Vs. the Meat-Eating Cyclist...

"And regardless of your food preferences, the comparison depends on how the food was produced and whether or not it was delivered from a local source, etc. Though even in a best-case scenario, the comparison should stay relatively close." What is your evidence for this claim? Is there really no difference in footprint between a largescale ranch with 500 head and a local farm with say 10?

  • reply
Posted By Michael Chandler - Sat, Feb 06 2010 at 1:09 PM EST

Yes there is a difference

Waste lagoons associated with industrial meat production create methane through anaerobic digestion which is not created by pasture raised meat. So local free-range pork and chicken have far lower global warming impact than the industrial alternatives and generally have less antibiotic and other chemical impact as well. Beef is a global warming loser pretty much any way you slice it due to enteric fermentation in their stomachs but local free range is still somewhat better (and healthier) than.... More

  • reply

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