TagAviation Emissions(61)

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  • 2023-05-02

    Contrails and their impact on climate

    This Delta Air Lines presentation from the 2023 Aviation Noise & Emissions Symposium explains what contrails are, how they form, and why they matter for the climate. Contrails are line-shaped clouds created by aircraft engine exhaust or air pressure changes, forming through a rapid process in which exhaust particles become water droplets and then ice crystals within seconds. The presentation explores how to measure contrails' environmental impact and what solutions, including route adjustments, Delta is pursuing to reduce it.
  • 2023-05-02

    Unleaded aviation gasoline

    Swift Fuels, a West Lafayette, Indiana-based company, presented on unleaded aviation gasoline at the Aviation Noise & Emissions Symposium 2023 at UC Davis. The company markets two premium unleaded avgas products: UL94, sold since 2015 with FAA STC approval and ASTM D7547 certification, and a forthcoming high-octane 100R formula. These fuels are designed as lead-free alternatives to conventional aviation gasoline, with approvals from both engine and airframe original equipment manufacturers.
  • 2023-03-01

    Aircraft Size Comparison – A320, A321, and Transcontinental/Transatlantic H2 Aircraft

    The image compares four narrow-body aircraft configurations: the conventional Airbus A320 and A321, alongside two hydrogen-powered concept variants labeled 'Transcontinental H2' and 'Transatlantic H2.' The H2 variants show large cylindrical hydrogen fuel tanks visible in the aft fuselage section, illustrating how liquid hydrogen storage would be integrated into the A320/A321 airframe for medium- and long-range zero-emission flight.
  • 2023-02-14

    Aviation Noise and Emissions Mitigation Act (H.R. 1048)

    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.
  • 2023-02-14

    Aviation Noise and Emissions Mitigation Act (H.R. 1048)

    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.
  • 1505 Pdf
    2023-01-23

    House Bill 1505 – Alternative Jet Fuel Industry in Washington

    Washington House Bill 1505 (2023) aims to promote the production and use of sustainable aviation fuels (SAF) by establishing tax incentives, clean fuel credits, and research initiatives to grow the alternative jet fuel industry in the state. The bill defines 'alternative jet fuel' as lower-carbon fuels that can be blended with conventional jet fuel without modifying aircraft engines or existing infrastructure. Beyond reducing greenhouse gas emissions, the legislation highlights improved air quality benefits for airport workers and communities surrounding airports like Sea-Tac.

  • ultra-fine-particles

    Infographic comparing sizes of airborne particulate matter relative to a human hair (50 micrometres in diameter): ultrafine particles (<100 nanometers), fine particles (<2.5 micrometres), and coarse fine particles (<10 micrometres). The diagram uses scaled spheres to visually illustrate how these pollution particles relate in size to a strand of human hair.

  • Effects of Ultrafine Particles

    Infographic from Daily News, illustrated by staff artist Warren Huskey, explaining how atmospheric ultrafine particles (diameter less than 0.1 micrometers) enter the human body and cause adverse health effects including possible brain cancer, heart attacks, and liver invasion. It details particle size comparisons (PM10, PM2.5, and ultrafines) relative to human hair thickness of 60 microns.

  • Lung Cancer

    A detailed medical infographic titled 'Lung Cancer' covering risk factors, types (small cell and non-small cell), stages, early detection methods, and treatments. Includes sections on environmental/external risk factors such as asbestos, beryllium, radon, and Agent Orange, with particular relevance to veterans.

  • PSCAA Community Workshop 6 1 2022

    A Zoom meeting screenshot shows a Puget Sound Clean Air Agency (PSCAA) Community Workshop presentation from May/June 2022 on transportation emissions. The slide displays two pie charts comparing sources of Particulate Matter and Greenhouse Gases from transportation, with participants including Kathy Strange (PSCAA), JC Harris (Des Moines), Alejandro Paredes, and Stephen Gerritson visible in the video tiles.