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Noise and climate impacts of an unconstrained commercial supersonic network

This paper estimates the environmental impacts of reintroducing commercial supersonic transport (SST) aircraft into the global aviation fleet. We model the landing and takeoff (LTO) noise, sonic boom...
Published 2019.01.30: Publication

Long-term aviation fuel decarbonization: Progress, roadblocks, and policy opportunities

Aviation is widely seen as the transport sector that is most difficult to decarbonize.  One option to dramatically reduce emissions within the aviation sector is through the use of low-carbon...
Published 2019.01.15: Publication

New supersonic transport aircraft: Fuel burn parity, or environmental parody?

In 2016, Sir Richard Branson, president of Virgin Atlantic Airways, announced that the Virgin Group would assist aviation start-up Boom in developing a new supersonic transport (SST) aircraft.  Boom...Boom Technologies' CEO claims the company's proposed supersonic aircraft's fuel burn will be on par with subsonic business-class travel. Will it?
Published 2018.09.28: Blog Post

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

Environmental performance of emerging supersonic transport aircraft

This paper provides a preliminary assessment of the environmental performance of new commercial supersonic transport aircraft (SST). Three U.S.-based startup companies are working to develop new SSTs...
Published 2018.07.17: 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

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

Cost-effective fuel-efficiency technologies could reduce new aircraft fuel consumption by 25% to 40% in near- to mid-term: New study

Feasible improvements dwarf the efficiency of new aircraft designs currently proposed or planned by manufacturers Substantial gap highlights need for more effective public policies to push energy...
Published 2016.09.27: News

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

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