Navigation Links
More than just the tailpipe

Trains, planes, buses and automobiles do not only effect the environment via their exhaust pipes. There is a full life-cycle of processes associated with getting from a to b that we rarely acknowledge.

Published today in IOP Publishing's Environmental Research Letters, Monday, June 8, 2009, researchers from the Department of Civil and Environmental Engineering at the University of California, Berkeley, have created a framework to help us calculate the true environmental cost of travel.

The new framework incorporates less-considered environmental impacts including the damage done by the power plants generating electricity for train travel and upkeep of train stations to the intensive energy costs of airport runway construction and ore extraction undertaken to build a car.

The catalogue of emissions that the researchers have compiled are taken from their own American context but the concept and framework is applicable universally looking at the full range of vehicles, from hatchbacks and pick-ups to light and heavy railways, small aircrafts and jumbo jets.

From cataloguing the varied environmental costs the researchers come to some surprising conclusions. A comparison between light railways in both Boston and San Franciso show that despite Boston boasting a light railway with low operational energy use, their LRT is a far larger greenhouse gas (GHG) emitter because 82 per cent of the energy generated in Boston is fossil-fuel based, compared to only 49 per cent in San Francisco.

Total life-cycle energy inputs and GHG emissions contribute an additional 155 per cent for rail, 63 per cent for cars and buses, and 32 per cent for air systems over vehicle exhaust pipe operation.

The researchers also touch on the effect of low passenger occupancy and show that we are nave to automatically assume one form of transport is more environmentally friendly than another. They conclude from their calculations that a half-full Boston light railway is only as environmentally friendly, per kilometre traveled, as a midsize aircraft at 38 per cent occupancy.

Mikhail Chester, researcher at Berkeley, said, "This study creates a framework for comprehensive environmental inventorying of several modes and future assessment of non-conventional fuels and vehicles can follow this methodology in creating technology-specific results.

"Through the use of life-cycle environmental assessments, energy and emission reduction decision-making can benefit from the identified interdependencies among processes, services and products."


Contact: Joe Winters
Institute of Physics

Post Your Comments:
(Date:10/12/2015)... 2015 NXTD ) ("NXT-ID" or the ... commerce market, reports on the recent SNS Future in Review ... --> NXTD ) ("NXT-ID" or the "Company"), a biometric ... on the recent SNS Future in Review Conference in ... Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company"), a ...
(Date:10/8/2015)... LAKE CITY , 8. Oktober 2015 ... TRCK), ein global tätiges Unternehmen des Bereiches ... einem Vertrag mit der Gefängnisbehörde Virginias (Department ... dessen Rahmen elektronische Überwachungsdienste für alle Strafen ... Derek Cassell , Präsident für den ...
(Date:10/6/2015)... 6, 2015 Track Group, Inc. (OTCQX: TRCK), ... has signed a contract with the Virginia Department of ... range of sentences under the Department,s oversight. ... "This contract with the Virginia DOC will expand our ... advances our position as a trusted leader in offender ...
Breaking Biology News(10 mins):
(Date:10/12/2015)... ... 12, 2015 , ... LifeTrak , a leader in consumer fitness, heart ... first amphibious fitness tracker that seeks to meet the needs of multi-sport athletes. Zoom ... rate monitoring both in water and on land, making it the only fitness ...
(Date:10/10/2015)... ANNAPOLIS, Maryland , le 10 octobre 2015 ... (D-CA) a intégré dans le Registre du Congrès ... internationale annuelle pour la sensibilisation autour du plasma ... L,IPAW est sponsorisée par la Plasma Protein ... et vise à : , Sensibiliser ...
(Date:10/9/2015)... ANNAPOLIS, Md. , Oct. 9, 2015 ... entered into the Congressional Record her statement recognizing the ... celebrated October 11-17. IPAW is sponsored by the ... companies, and is designed to:   , Raise ... contributions of plasma donors in saving and improving lives ...
(Date:10/9/2015)... and ROCKVILLE, Md. , Oct. ... privately-held biotechnology company developing next generation vaccines based ... has entered into an exclusive worldwide licensing agreement ... the treatment or prevention of any and all ... agreement, Immunomic Therapeutics will receive an upfront payment ...
Breaking Biology Technology: