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Airplanes and climate change

May 26, 2025 By EarthWise Leave a Comment

Climate change poses all sorts of issues for the aviation industry

The aviation industry is a powerful force in the global economy.  In fact, according to some estimates, the industry transports the equivalent of nearly half the world’s population every year.  But the world’s airports were largely designed for an older era – a cooler one.

As air warms, it becomes less dense, which makes it harder for airplanes to generate lift, which is the force that enables them to fly.

According to a new study by scientists from the University of Reading in the U.K., rising temperatures due to climate change may force aircraft at some airports to reduce passenger numbers in the coming decades.

The research team examined how warmer air affects aircraft performance during takeoff at 30 sites across Europe.  The study, which was recently published in the journal Aerospace, focused on the Airbus A320, which is a common aircraft used for short and medium-distance flights across Europe.

By the 2060s, the research team found that some airports with shorter runways may need to reduce their maximum take-off weight by the equivalent of approximately 10 passengers per flight during summer months.

Of the sites included in the study, Chios in Greece, Pantelleria and Rome Ciampino in Italy, and San Sebastian in Spain will be the four most affected popular tourist destinations.

Climate change is also making air travel increasingly turbulent, and the aviation industry itself remains a growing contributor to global greenhouse gas emissions. 

Taking meaningful action to curb greenhouse gas emissions, including those from the aviation industry, is one of the most crucial ways to mitigate global climate change.

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Holiday flights could carry fewer passengers as world warms

Photo, posted September 29, 2017, courtesy of Hugh Llewelyn via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Dangers of distant fires

January 6, 2025 By EarthWise Leave a Comment

Smoke from wildfires can drift thousands of miles

Smoke from wildfires is well known to exacerbate health problems like heart disease, lung conditions, and asthma.  People living in the vicinity of where fires occur face these dangers.  But a new study at the University of Maryland has found that there are health impacts from wildfires occurring thousands of miles away.

During the summer of 2023, massive Canadian wildfires created a vast plume of smoke that drifted more than 2,000 miles across the country resulting in poor air quality across the entire East Coast of the U.S. 

Baltimore had very dark skies over a six-day period in June 2023, sending many individuals to doctors’ offices complaining of breathing issues.  University of Maryland researchers found that medical visits for heart and lung problems rose by nearly 20% during that period.

Using satellite and EPA data combined with electronic health records, the researchers found increased likelihood of patients going to the doctor for complications related to cardiopulmonary conditions during the days with the most smoke in the air.  They found a 55% increase in the risk for an outpatient visit for heart and lung conditions and these additional patients tended to be older, non-smokers, and more socio-economically affluent than the typical patients who see their doctors for such conditions when the air quality is good.

With more climate-related events likely to occur in the future, doctors may require better tools to help disadvantaged patients on so-called hotspot days when conditions are most dangerous.  Increasingly common wildfires are a particular danger to people even when those fires are far away from where they live.

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Exposure to Remote Wildfire Smoke Drifting Across the U.S. Linked to Increased Medical Visits for Heart and Lung Problems

Photo, posted June 8, 2023, courtesy of Marc A. Hermann / MTA via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Benefits of electric school buses

July 1, 2024 By EarthWise Leave a Comment

Converting to electric school buses

There are about half a million school buses in use in the U.S.  A large number of them are older, highly polluting diesel buses.  There are well-established health and climate benefits of switching from diesel vehicles to electric vehicles but making the switch is expensive.  Diesel buses generally cost between $65,000 to $120,000, depending on the type and configuration.  Electric buses cost about $250,000 each.

The substantial cost makes it a difficult decision for local, state, and federal officials, particularly since the actual magnitude of the benefits is not well known.

A new study by researchers at Harvard’s T.H. Chan School of Public Health has quantified these benefits.  According to the study, replacing each bus may yield up to $247,600 in climate and health benefits. These benefits derive from fewer greenhouse gas emissions and from reduced rates of adult mortality and childhood asthma. 

The study compared the amounts of carbon dioxide emitted from diesel bus tailpipes to the emissions associated with generating electricity for the buses and producing their batteries.  It also compared how these respective emissions contribute to fine particulate air pollution, which is linked to adult mortality and the onset of childhood asthma.  The study concluded that particularly in dense urban settings, the savings incurred from electrifying older school buses easily outweigh the costs of replacing them.

An important question not tackled in the study is how electric school buses impact children’s exposure to in-cabin air pollution while riding the bus.  This issue could further inform policy decisions.

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Electric school buses may yield significant health and climate benefits, cost savings

Photo, posted May 9, 2008, courtesy of Christine H. via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

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