The reality of the climate impact of long-distance passenger travel has been revealed in new research from the University of Leeds.
Whilst the number of long and short distance domestic journeys by car have fallen slightly over the last 25 years, international air travel has increased significantly, driven by an increase in trips for leisure and visiting friends and family. Using a new metric they have created, called emission reduction sensitivity, the research team has calculated which types of travel could be changed to maximise a reduction in carbon emissions from passenger travel whilst affecting as few people or trips as possible.The research found that if all car journeys under eight miles were shifted to walking or cycling, there would be a 9.3% reduction in carbon emissions.
At the top end, theoretically limiting everyone who flies now to one return flight abroad per year would have a value of 158.3, as so few journeys would be affected. The data was collected from the Department for Transport's National Travel Survey, and the International Passenger Survey, which is organised by the Office for National Statistics.
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