Why do European diesel cars get better mileage?

Dear EarthTalk: I don’t understand why there are many European diesel cars with very high mileage ratings that are not available in the United States. Can you enlighten?

John Healy

Fairfield, Conn.

Different countries do have differing standards in regard to how much pollution gasoline and diesel automobile engines are allowed to emit, but the reason you see fewer diesel cars in the United States is more of a choice by automakers than the product of a decree by regulators on either side of the Atlantic.

Since the advent of the automobile age in the United States, gasoline has been king of the road; today upward of 95 percent of passenger cars and light trucks on American roads are gas-powered. And the federal government has done its part to keep it that way, taxing diesel at a rate about 25 percent higher than gasoline. A recent assessment by the American Petroleum Institute, an oil industry trade group, found that federal taxes accounted for 24.4 cents per gallon of diesel but only 18.4 cents per gallon of gasoline.

In Europe, where in many regions about half of the cars on the road run on diesel, these tax incentives are flip-flopped, with diesel drivers reaping the economic benefits accordingly.

But according to Jonathan Welsh, who writes the “Me and My Car†Q&A column for The Wall Street Journal, interest in diesels — which typically offer better fuel efficiency than gas-powered cars — has gained significant momentum in the United States in recent years given the uptick in gasoline prices. The popularity of diesels also surged, albeit briefly, in the mid-1970s after the United States suffered its first “oil shock†that sent gas prices through the roof. But gas prices settled down and so did American fervor for diesels at that point.

Today, though, with so much emphasis on going green, diesel cars — some of which boast similar fuel efficiency numbers as hybrids — are on the comeback trail in the United States. Recently passed regulations require diesel fuel sold in the United States today to have ultra low emissions, which appeals to those concerned about their carbon footprints and other environmental impacts. Also, the increased availability of carbon-neutral biodiesel — a form of diesel fuel made from agricultural wastes that can be used in place of regular diesel fuel without any engine modifications — is convincing a whole new generation of American drivers to consider diesel-powered cars. Right now only Volkswagen, Mercedes and Jeep sell diesel-powered cars in the United States, but Ford, Nissan and others plan to launch American versions of diesel models already successful in Europe within the next year.

Meanwhile, the U.S. Coalition for Advanced Diesel Cars, a trade group that represents several automakers as well as parts and fuel suppliers, would like to see the U.S. government increase incentives for American drivers to choose diesel-powered engines by leveling the fuel taxation field — so gasoline and diesel could compete fairly at the pump — and by boosting tax breaks on the purchase of new, more fuel-efficient diesel vehicles. One hurdle is the relative lack of filling stations across the United States with diesel pumps, but as such vehicles become more popular, filling stations that don’t already offer them can relatively easily add a diesel pump or two.

CONTACTS: American Petroleum Institute, api.org; U.S. Coalition for Advanced Diesel Cars, cleandieseldelivers.com.

Dear EarthTalk: What does “carbon neutral†really mean? And is it really possible to live in such a manner without just resorting to buying carbon credits?

Vera Hoffman

Seattle, Wash.

Carbon neutral is a term that has sprouted many definitions, and how to achieve it has spawned numerous interpretations, too. According to the New Oxford American Dictionary, which made carbon neutral its 2006 “Word of the Year,†it involves “calculating your total climate-damaging carbon emissions, reducing them where possible, and then balancing your remaining emissions, often by purchasing a carbon offset.â€

But the term is really so 2006. Today’s term, “climate neutral,†complicates the issue. Tracking carbon is great, but carbon dioxide (CO2) is only one of several greenhouse gases that contribute to global warming, says the 2008 publication, “Kick the Habit: A U.N. Guide to Climate Neutrality,†by the United Nations Environment Program. CO2 makes up some 80 percent of the world’s greenhouse gases, but five others — nitrous oxide, hydrofluorocarbons, perfluorocarbons, sulphur hexafluoride and methane — also contribute. Limits on all six gases were called for by the Kyoto Protocol international climate treaty.

Semantics aside, whether a person can live in a climate-neutral manner is a question of lifestyle choices and making improvements over time. Start your climate neutral quest by calculating your energy usage. Type “climate footprint†or “carbon footprint†into Google and try a couple of calculators that track use in different ways. One is Earthlab’s (earthlab.com/createprofile/reg.aspx); the University of California at Berkeley also offers one at bie.berkeley.edu/files/ConsumerFootprintCalc.swf.

For a calculation, you’ll need information about your home energy use and your travel by car and public transit. Some calculators ask whether you’re vegetarian, how much you recycle and compost, and how much you spend buying goods and dining out. The equation can get involved. Record your information sources, and then revisit the calculator periodically with new numbers to see how you’re doing.

The final element involves a carbon offset, “an emission reduction credit from another organization’s project that results in less carbon dioxide or other greenhouse gases in the atmosphere than would otherwise occur,†says the David Suzuki Foundation, which promotes “ways for society to live in balance with the natural world.†You can purchase credits from a renewable energy company, for instance, to offset the amount of carbon emissions you can’t eliminate through other measures.

Will your efforts make a difference? “Kick the Habit†says that, for individuals, “less than 50 percent are direct emissions (such as driving a car or using a heater).†About 20 percent are caused by the creation, use and disposal of products we use; 25 percent comes from powering workplaces; and 10 percent from maintaining public infrastructure. You can drive your car less and turn down the heat, but consider ways you can affect business and government policies that could tap into that other 50-plus percent.

“We are all part of the solution,†wrote U.N. Secretary-General Ban Ki-moon in the foreword to “Kick the Habit.†“Whether you are an individual, a business, an organization or a government, there are many steps you can take to reduce your climate footprint. It is a message we must all take to heart.â€

CONTACT: “Kick the Habit,†unep.org/publications/ebooks/kick-the-habit.

SEND YOUR ENVIRONMENTAL QUESTIONS TO: EarthTalk, PO Box 5098, Westport, CT 06881; earthtalk@emagazine.com. Read past columns at emagazine.com/earthtalk/archives.php. EarthTalk is now a book! Details and order information at emagazine.com/earthtalkbook.

Latest News

A new life for Barrington Hall

A new life for Barrington Hall

Dan Baker, left, and Daniel Latzman at Barrington Hall in Great Barrington.

Provided

Barrington Hall in Great Barrington has hosted generations of weddings, proms and community gatherings. When Dan Baker and Daniel Latzman took over the venue last summer, they stepped into that history with a plan not just to preserve it, but to reshape how the space serves the community today.

Barrington Hall is designed for gathering, for shared experience, for the simple act of being together. At a time when connection is often filtered through screens and distraction, their vision is grounded in something simple and increasingly rare: real human connection.

Keep ReadingShow less

Gail Rothschild’s threads of time

Gail Rothschild’s threads of time

Gail Rothschild with her painting “Dead Sea Linen III (73 x 58 inches, 2024, acrylic on canvas.

Natalia Zukerman

There is a moment, looking at a painting by Gail Rothschild, when you realize you are not looking at a painting so much as a map of time. Threads become brushstrokes; fragments become fields of color; something once held in the hand becomes something you stand in front of, both still and in a constant process of changing.

“Textiles connect people,” Rothschild said. “Textiles are something that we’re all intimately involved with, but we take it for granted.”

Keep ReadingShow less

Sherman Players celebrate a century of community theater

Sherman Players celebrate a century of community theater

Cast of “Laughter on the 23rd Floor” from left to right. Tara Vega, Steve Zerilli, Bob Cady (Standing) Seated at the table: Andrew Blanchard, Jon Barker, Colin McLoone, Chris Bird, Rebecca Annalise, Adam Battlestein

Provided

For a century, the Sherman Players have turned a former 19th-century church into a stage where neighbors become castmates, volunteers power productions and community is the main attraction. The company marks its 100th season with a lineup that blends classic works, new writing and homegrown talent.

New England has a long history of community theater and its role in strengthening civic life. The Sherman Players remain a vital example, mounting intimate, noncommercial productions that draw on local participation and speak to the current cultural moment.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

Reimagining opera for a new generation

Reimagining opera for a new generation

Stage director Geoffrey Larson signs autographs for some of the kids after a family performance.

Provided

For those curious about opera but unsure where to begin, the Mahaiwe Theater in Great Barrington will offer an accessible entry point with “Once Upon an Opera,” a free, family-friendly program on Sunday, April 12, at 2 p.m. The event is designed for opera newcomers and aficionados alike and will include selections from some of opera’s most beloved works.

Luca Antonucci, artistic coordinator, assistant conductor and chorus master for the Berkshire Opera Festival, said the idea first materialized three years ago.

Keep ReadingShow less
BSO charts future amid leadership transition and financial strain

Aerial view of The Shed at Tanglewood in Lenox, Massachusetts.

Provided

The Boston Symphony Orchestra is outlining its path forward following the announcement that music director Andris Nelsons will step down after the 2027 Tanglewood season, closing a 13-year tenure.

In a letter to supporters, the BSO’s Board of Trustees acknowledged that the news has been difficult for many in its community, while emphasizing gratitude for Nelsons’ leadership and plans to celebrate his final season.

Keep ReadingShow less
A tradition of lamb for Easter and Passover

Roasted lamb

Provided

Preparing lamb for the observance of Easter is a long-standing tradition in many cultures, symbolizing new life and purity. For Christians, Easter marks the end of Lenten fasting, allowing for a celebratory feast. A popular choice is roast lamb, often prepared with rosemary, garlic or lemon. It is traditional to serve mint sauce or mint jelly at the table.

The Hebrew Bible suggests that the last plague God inflicted on the Egyptians, to secure the Israelites’ release from slavery, was to kill the firstborn son in every Egyptian home. To differentiate the Israelites from the Egyptians, God instructed them to mark their doorposts with the blood of a lamb. Today, Jews, Christians and Muslims generally believe that God would have known who was Israelite and who was Egyptian without such a sign, but views of God’s omnipotence in the Abrahamic faiths have evolved over the millennia.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.