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Diesel or hybrid? How about both?

Wired News has reported that General Motors, DaimlerChrysler, and Ford are working on diesel-hybrid prototypes.

According to Charlie Freese, executive engineering director at GM Powertrain:

... many factors that make diesel engines more efficient include operating unthrottled and more efficient oxidizing of fuel. Diesel engines also have a higher compression ratio, and the heavier diesel fuel has a higher energy density ... diesel and hybrid technologies have synergies because hybrid systems reduce fuel consumption by relying on the electric motor while idling and during acceleration of stop-and-go traffic. Diesel engines are optimized for hauling heavy loads and for steady-speed highway driving.

Now, longtime Grist readers will know that Umbra has had some harsh words when it comes to diesel (but not biodiesel and SVO though). While responding to a reader asking if a higher gas mileage diesel car is better than a less-particulate-emitting gasoline engine, she offered the following analogy:

Let's recall some stale high school stereotypes: the cruel football player and the catty cheerleader. Diesel oil is the football player -- big, strong, lunk-headed, unwashed, and mean. Gasoline is the cheerleader: slimmer, well-groomed, and socially manipulative. They're both toxic to the school atmosphere, but people are more inclined to avoid the bully, because he is more immediately physically hazardous.

Umbra sums up her article by saying, "... all diesel cars are considered 'inferior' in the American Council for an Energy-Efficient Economy's Green Book." But what would Umbra think of a diesel hybrid engine? Here's what Dan Benjamin, an analyst at ABI Research, had to say:

"Can hybrid engines help (reduce) diesel emissions? Absolutely," Benjamin said. Although diesel vehicle manufacturers will likely add filters or catalytic converters to reduce emissions, "hybrid systems can cut emissions by eliminating situations where NOx (nitrogen oxide) emissions are at their very worst," according to Benjamin. Meeting California's tougher emissions requirements, which have been adopted by four other states, presents more of a challenge, Benjamin said.

So maybe those nasties Umbra is worried about won't be as much as a concern. What say you?

Tamayo-Paced

Honduras forest activists slow deforestation In central Honduras, where deforestation is widespread, poor farmers and rural residents under the leadership of Roman Catholic priest Andres Tamayo have had a string […]

Chew on this

I received a letter from freelance illustrator Kirk Werner in response to my post on gum pollution. Werner wrote to tell me about his latest work, a children's book about gum littering written by Sherry Garr and titled a Grist-worthy Gumfounded. The Gumfounded website offers some peeks into the book and the main character Tia, who steps in gum and begins sticking to all types of litter, which she drags all the way to school. The duo is also planning to add books on air pollution and water conservation to the Tia series.

Eco-label watchdog Urvashi Rangan answers questions

Urvashi Rangan. What work do you do? I’m an environmental-health scientist and policy analyst at Consumers Union. I also manage two public-education websites. Consumers Union also publishes Consumer Reports magazine, […]

A truly green house

This news bit is a little late, but still worth noting: Last month, an independent team made up of designers from Seattle architecture/design firm Mithun won first place in an international sustainable housing competition in Roanoke, Virginia, with their design for a house powered by--of all things--spinach. The house (the design is pictured at left) will be built this summer in Roanoke, along with other contest winners.

The C2C Home Competition, which drew 625 entries from 41 countries, was inspired by William McDonough and Michael Braungart's work on cradle-to-cradle design principles. They ask designers to go beyond pollution prevention to creating objects and processes that nourish and replenish our communities, using materials that can be recycled indefinitely.

The team's house takes energy from the sun and uses spinach protein sandwiched between glass to generate electricity for the entire neighborhood, turning the house into a supplier rather than a consumer--a house that acts more like a tree than like a machine.

Umbra on having kids, revisited

Dear Umbra, What do you feel is the one issue of personal responsibility regarding the environment that people ignore the most? VaughnJackson, Tenn. Dearest Vaughn, Reproduction. But what can you […]

The real meaning of “roadless”

While shilling for drilling during last week's Senate debate over the Arctic National Wildlife Refuge, Lisa Murkowski (R-Alaska) claimed that oil development would have a negligible effect on the area: "When we talk about the roadless areas we have available for exploration, we mean it. We do mean that we are going to put down an ice road that will disappear when the summer comes."

Bizarrely, as Felicity Barringer of The New York Times points out, roadless might not mean what you think it means.  

"[T]he term 'roadless' does not mean an absence of roads," Interior Department officials wrote in a recent environmental impact statement about drilling in another region of Alaska. "Rather, it indicates an attempt to minimize the construction of permanent roads."

The sheer inventiveness of the Bushies' Orwellian contortions is awe-inspiring.

Response to “Death”: Part V

Today is Part V of Ken Ward's response to "The Death of Environmentalism," in which he concludes by laying out concrete steps the movement could take to mount an appropriate response to the danger of global warming. It's a bold strategy -- curious to hear what readers think of it.

Don't forget to read Part I, Part II, Part III, and Part IV.

More Wolfowitz, more oil, more looney-tunes

Gawd. Speaking of oil: It really is astonishing what some folks in this administration are willing to do to avoid breaking our petrol-addiction.

Wall Street and peak oil

At this point, predictions of peak oil are no biggie. But it seems significant that a Wall Street research and analysis firm -- John S. Herold Inc. -- is getting in the game. The analysts at Herold ...

... have begun estimating when each of the world's biggest energy companies will peak in its ability to produce oil and gas. Herold's work shows that the best minds in the energy industry are accepting the reality that the globe is reaching (or has already reached) the limit of its own ability to produce ever increasing amounts of oil.

...

Since last fall, Herold has done peak estimates on about two dozen oil companies. Herold believes that the French oil company, Total S.A., will reach its peak production in 2007. Herold expects 2008 to be critical, with Exxon Mobil Corp., ConocoPhillips Co., BP, Royal Dutch/Shell Group, and the Italian producer, Eni S.p.A., all hitting their peaks. In 2009, Herold expects ChevronTexaco Corp. to peak. In Herold's view, each of the world's seven largest publicly traded oil companies will begin seeing production declines within the next 48 months or so.

Of course Herold's specific predictions are controversial, but the firm itself is quite well-respected. Peak oil is slowly but surely sinking into mainstream discourse. If Herold is correct, says Salon:

• Oil prices -- which are already at record levels -- will continue rising as demand outstrips supply. In a few years, gasoline prices of $2 per gallon could seem like a bargain.
• State-owned oil companies like Mexico's Pemex, Venezuela's PDVSA (Petroléos de Venezuela) and Saudi Arabia's Saudi Aramco may be unable to increase their production enough to meet burgeoning global demand.
• The producers who belong to the Organization of the Petroleum Exporting Countries, and Saudi Arabia in particular, may have even more leverage over the global oil market in the coming years.
• The United States will be ever more reliant on oil imported from countries filled with people who don't like George W. Bush or his policies.

Read the whole thing.