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Carbon intensity gap surged to a new high of 63% for transatlantic carriers in 2017

Updated study shows fuel efficiency improving an average of 1% per year since 2014, less than industry goal. A study released today by the International Council on Clean Transportation (ICCT)found...
Published 2018.09.11: News

Transatlantic airline fuel efficiency ranking, 2017

This report compares the fuel efficiency of 20 airlines operating nonstop flights between the mainland United States and Europe. It uses the same methodology as in the 2016 transpacific fuel...
Published 2018.09.11: Publication

Reviving supersonic flight would likely have significant harmful environmental consequences, new analysis shows

New supersonic aircraft could burn 5 to 7 times more fuel than standard aircraft and exceed CO2 emission limits by 70% The re-introduction of supersonic transport aircraft (SST) into commercial...
Published 2018.07.17: News

Did the Delta and United exit from the Persian Gulf have any effect on the market’s fuel efficiency?

In the first quarter of 2016, both Delta Air Lines and United Airlines ended all flights from the U.S. to the Persian Gulf. Delta stated that they terminated their Atlanta-Dubai route because it was...With the exit of Delta and United from the Persian Gulf market, one would expect that there was some impact on the market’s average fuel efficiency. But, is it due to a less diverse mix of aircraft,...
Published 2018.04.24: Blog Post

Transpacific airline fuel efficiency ranking, 2016

This report compares the fuel efficiency of 20 airlines operating nonstop flights between the mainland United States and East Asia and Oceania. It extends the previous transatlantic fuel efficiency...
Published 2018.01.16: Publication

Hainan and ANA operate the most fuel-efficient transpacific flights

New study ranking 20 carriers shows 64% gap between leaders and least efficient Qantas Hainan Airlines and All Nippon Airways (ANA) ranked first in overall fuel efficiency among transpacific...
Published 2018.01.16: News

U.S. domestic airline fuel efficiency ranking, 2015–2016

Following in the footsteps of the 2010–2014 airline rankings, this study ranks U.S. domestic air carriers by their overall fuel efficiency for the years 2015 and 2016. The analysis continues the use...
Published 2017.12.14: Publication

Profits and carbon emissions surge for U.S. domestic airlines

Low fuel prices and high travel demand undercut overall fuel-efficiency gains in aircraft operations in 2015 and 2016, study finds Annual fuel-efficiency ranking of domestic carriers shows Alaska...
Published 2017.12.14: News

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

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