TagAviation Emissions(79)

Airbus's 'fello'fly' program explores formation flying as a fuel-saving technique, where a follower aircraft positions itself in the smooth updraft of a leading aircraft's wake to recover otherwise wasted kinetic energy. This approach can reduce trip fuel consumption and emissions by around 5% for the follower aircraft, making it most beneficial on long-haul routes exceeding 2,000 nautical miles. Key factors affecting savings include aircraft pairing, the follower's position on the vortex, time spent in formation, and fuel used to enter the formation.

H.R. 1048, the Aviation Noise and Emissions Mitigation Act, introduced in February 2023, would direct the EPA to establish a 3-year pilot grant program to measure aircraft and airport noise and emissions—including greenhouse gases, particulate matter, and ultrafine particles—in communities near airports and flight paths. Grant recipients would be required to use technology capable of tracing noise and emissions to specific sources, produce neighborhood- and ZIP Code-level data, and work with local organizations to develop mitigation strategies. The program aims to create a replicable national model for ongoing monitoring and to identify frontline communities disproportionately impacted by aviation-related pollution.

Delta Air Lines has committed to reaching net zero carbon emissions by 2050, with shorter-term goals including using 10% Sustainable Aviation Fuel (SAF) by 2030 and setting science-based emissions targets aligned with aviation industry guidance. To reduce its environmental footprint, Delta has retired over 200 older aircraft and replaced them with newer, more fuel-efficient models that burn 20-25% less fuel. The airline's emissions reduction strategy relies on three main levers: fleet renewal, operational improvements, and increased use of SAF.

Aviation's climate impact is roughly three times greater than its CO2 emissions alone, because burning jet fuel at altitude also produces contrails, induced cloudiness, and NOx byproducts that add significant additional warming. A 2020 study by 21 leading scientists found that in 2018, aviation accounted for approximately 5.9% of all human-caused global heating when these non-CO2 effects are included. The fact sheet calls for immediate action including contrail-avoidance flight routing, cleaner fuels, stricter emissions regulations, and reduced air traffic overall.

A University of Washington thesis by Mariah Dittmore investigates whether short-term exposure to ultrafine particles from aircraft engines causes measurable cardiorespiratory harm at concentrations found in surrounding communities, and whether personal protective equipment can reduce that harm. The research builds on a 2018 Los Angeles study that linked walking near aircraft pollution to elevated blood inflammation markers, while noting that roadway traffic posed its own distinct respiratory risks. The findings are relevant to policy discussions around Seattle-Tacoma International Airport and the health of workers and residents exposed to aircraft emissions.