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World Health Organization: Diesel fumes cause cancer

The WHO elevated diesel's status to "known carcinogen" and warned that the fumes are a greater risk for lung cancer than secondhand cigarette smoke.

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Sarah Gardner: The World Health Organization announced this week that diesel fumes definitely cause lung cancer. The WHO has labeled diesel as a "known carcinogen." Not exactly the kind of thing advocates of clean diesel want to hear right now.

Marketplace's Nancy Marshall Genzer reports on diesel's brand image and what this latest pronouncement might mean for the fuel.


Nancy Marshall-Genzer: So, who hasn’t run from the stinky wake of a noisy bus or semi? Turns out, there’s a reason to hold your nose.

Frank O'Donnell: It’s like a giant, rolling cigarette, causing risks very much akin to being someone locked in a room with someone else who’s smoking.

That’s Frank O’Donnell, president of Clean Air Watch. He says we’re not just dodging fumes from soot spewing buses and trucks. Trains and boats also use diesel. Diesel engines power construction equipment and tools used by miners.

Allen Schaeffer heads the Diesel Technology Forum, a trade group. He  says the WHO relied too much on studies of old diesel engines in determining that diesel fumes cause cancer.

Allen Schaeffer: In many ways, it feels like a very retrospective look backwards. You know, like looking in the rearview mirror to try and help inform what our policies are today.

Schaeffer says the new diesel engine is very different -- it burns cleaner fuel, has emissions controls and filters. But is that going to be clear to consumers thinking about buying a diesel car? Or will they be scared away by the WHO’s cancer warning? Schaeffer says new diesel will not lose its luster.

Schaeffer: I think there’s a very bright future for all kinds of clean diesel technology, from passenger cars to the biggest off-road construction and mining equipment.

But there are still plenty of old diesel engines around to give the new ones a bad name. Frank O’Donnell estimates there are millions in the U.S. because diesel is durable. Engines last up to 30 years.

In Washington, I’m Nancy Marshall-Genzer for Marketplace.

About the author

Nancy Marshall-Genzer is a senior reporter for Marketplace based in Washington, D.C. covering daily news.
Radar121's picture
Radar121 - Jun 15, 2012

How come Bio diesel is never talked about? I ran a 2004 VW bug diesel on REFINED bio diesel for a hundred thousand miles, and I towed a small camper across country with it running bio diesel. I never had soot on my tailpipe using bio diesel, No Smoke or Smell, nothing but 35 MPG towing 55 MPG not towing. It is an extremely clean burning fuel, and you can make it yourself. If the electrical system wasn't so poorly engineered, I would have kept the VW. However, the engine has a lot of pulling power. I climbed mountains in california towing a 13 foot Scamp camper, and the little diesel did it with ease. My Toyota Tocoma 2.4L can't hack the hills between Fall Brook and La Jolla.

SouthernPoint's picture
SouthernPoint - Jun 14, 2012

WOW! Who knew diesel fumes were bad to inhale? Summary of WHO report sounds terrible, but why is their not a comparison with gasoline fumes? Yes, all petroleum based fumes are bad! What about looking at the crazy improvements true diesel engine manufacturer's have rolled out recently. Dodge had a great diesel engine for full size trucks in the late 90's, and they pulled it. Any knowledgeable work truck buyer jumps at the chance for this trucks. Solar generated electricity is better than diesel, diesel is better than gasoline, investors in gasoline infrastructure will lose before diesel investors. Gas engines are the modern day equivalent to kerosene fueled lamps!

RichardNYC's picture
RichardNYC - Jun 14, 2012

"Retrospective look backwards" instead of forward?