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Maximizing aircraft fuel efficiency: Designing from scratch

Why aren’t we seeing more radically fuel-efficient aircraft, the way we're seeing more efficient cars and trucks? You can get a lot of different answers to that question, depending on who you ask. We...Why aren’t we seeing more radically fuel-efficient aircraft, the way we're seeing more efficient cars and trucks? You can get a lot of different answers to that question, depending on who you ask....
Published 2017.06.14: Blog Post

Alternative jet fuel development and deployment in North America

International aviation GHG emissions from airline carriers based in Canada and the United States increased from 36.2 to 60.2 million tonnes (MtCO2e) per year from 1990 through 2015—and they are...
Published 2017.05.30: Publication

Mitigating international aviation emissions: Risks and opportunities for alternative jet fuels

The aviation sector—and its associated GHG emissions—are projected to grow at an exponential rate over the next several decades. To mitigate this rise in emissions, some have touted alternative jet...
Published 2017.03.22: Publication

Brother, can you spare three cents (for the climate)?

Optimism is growing for a potential deal at ICAO’s 39th Assembly this week on a global market-based measure (MBM) to price carbon emissions from international aviation. Under the system, carriers...A back-of-the-envelope calculation shows that the ICAO agreement would entail the aviation industry paying about three cents on the dollar of its climate damages from 2021 to 2035.
Published 2016.10.03: Blog Post

Cost assessment of near- and mid-term technologies to improve new aircraft fuel efficiency

This report summarizes the results of the first independent, bottom-up cost assessment of near and mid-term technologies to improve new aircraft fuel efficiency. Carried out in cooperation with a...
Published 2016.09.27: Publication

Is it possible to fly "green" and have a little legroom?

In airline economy class, the tradeoff for lower fares includes less seat space—sometimes a lot less. Nobody likes it. But does that ever-shrinking legroom also mean so much higher fuel efficiency...More efficient aircraft combined with a one-class cabin having minimum seat standards could give a lot more people a lot more comfortable flights without giving up much, if anything, in fuel...
Published 2016.03.16: Blog Post

Transatlantic airline fuel efficiency ranking, 2014

This report compares the fuel efficiency, and therefore carbon intensity, of the top 20 airlines on transatlantic routes between North America and Europe in 2014. It is the first analysis to combine...
Published 2015.11.16: Publication

U.S. domestic airline fuel efficiency ranking, 2014

This study, the fourth in a series of yearly analyses of U.S. airlines on domestic operations, arrives as we near a potential turning point for public policy concerning aviation and the environment....
Published 2015.10.22: Publication

Carbon diary of a reluctant traveler

As we enter the new year many of us are in the habit of making New Year’s resolutions. Personally, I take the time to balance my family’s books, mostly financially but from time to time...Balancing the personal carbon books at year end puts some recent articles on the environmental cost of air travel into sobering perspective.
Published 2015.01.06: Blog Post

U.S. airline fleets due for renewal

One of the main takeaways from our 2013 U.S. airline fuel efficiency ranking is that overall U.S. domestic airlines showed no year-to-year improvement in fuel efficiency. That is not surprising. In...If the U.S. aviation sector is going to meet its 2020 carbon-neutral growth goal, airline efficiency improvements via new aircraft and engine technology will have to increase sharply from their...
Published 2014.12.05: Blog Post

U.S. domestic airlines show no overall improvement in fuel efficiency in 2013

Spirit, Frontier tie Alaska for most fuel-efficient U.S. domestic airline in 2013  American slips, with no overall improvement for U.S. airlines Alaska, Spirit, and Frontier Airlines tied as the most...
Published 2014.11.19: News

U.S. domestic airline fuel efficiency ranking, 2013

The newest release of this annual rankings report compares the fuel efficiency, and therefore carbon intensity, of U.S. airlines on domestic operations in 2013. The report also investigates changes...
Published 2014.11.19: Publication

Inflight Luxury: Who Really Pays?

A couple of weeks ago Etihad Airways, the national airline of the United Arab Emirates, introduced in its new Airbus A380 jumbo jets “The Residence”, a 125-square-foot, three-room suite. It’s your...Etihad Airways has introduced some new "seating" in its new Airbus A380 jumbo jets: The Residence, a 125 sq-ft, 3-room suite. Costs about $43,000 for some flights—plus a load of additional carbon in...
Published 2014.05.30: Blog Post

U.S. Domestic Airline Fuel Efficiency Ranking

Two studies will be discussed: the original 2010 benchmark study, and the more recent 2011/2012 update. Collectively, the studies provide the first apples-to-apples comparison of airline efficiency...
Published 2014.05.21: Event

Airline efficiency: Waiting for ICAO?

The gap between the most fuel-efficient and least fuel-efficient airlines on U.S. domestic operations stayed rock-steady at 26% from 2010 to 2012. Meanwhile, overall industry fuel efficiency improved...U.S. airlines' fuel efficiency improved about 1.1% per year in 2010–2012, short of both the U.S. government's assumptions in its GHG reduction plan and ICAO's goal. Meanwhile, public policies are...
Published 2014.05.05: Blog Post

U.S. domestic airlines show modest improvement in fuel efficiency since 2010

Top Performers Alaska and Spirit Airlines Widen Lead The overall fuel efficiency of U.S. airlines on domestic operations improved by 2.3% from 2010 to 2012, less than what is needed to meet U.S....
Published 2014.04.30: News

U.S. domestic airline fuel efficiency ranking, 2011–2012

Airlines’ in-use fuel efficiency is directly related to aviation’s climate impact. In the U.S., aviation accounted for about 11% of energy-related carbon dioxide emissions from the transportation...
Published 2014.04.30: Publication

[News release] Quantifying a gap: Fuel efficiency performance of U.S. domestic airlines

The most fuel-efficient U.S. domestic passenger airline was 26% better than the least fuel-efficient one in 2010, according to a report released today by the International Council on Clean...
Published 2013.09.10: News

U.S. domestic airline fuel efficiency ranking, 2010

Aviation plays a vital role in the modern global economy, but it is a significant and growing source of greenhouse gas emissions, and of oil demand. GHG emissions from aviation are projected to...
Published 2013.09.10: Publication

Evaluating air carrier fuel efficiency and CO2 emissions in the U.S. airline industry

In light of volatile fuel prices, rising concern over climate change, and the global economic importance of aviation, developing the capability to evaluate airline fuel efficiency is critical. Policy...
Published 2013.09.10: Publication

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