TagAviation Emissions(100)

A presentation by Tim Johnson of the Aviation Environment Federation, delivered at the Aviation Noise & Emission Symposium in February 2021, examines what civil society expects from a green recovery in the aviation sector. It highlights growing airline commitments to net-zero emissions by 2050, including pledges from British Airways, United Airlines, and others, while raising the question of whether 2019 may have been the peak year for aviation CO2 emissions. The talk explores the intersection of post-pandemic recovery and environmental accountability in the airline industry.

A 2021 seminar by DLR researcher Christiane Voigt examines how aviation contributes to climate change through CO2 emissions, contrail cirrus clouds, and NOx gases, with contrail cirrus identified as the largest single warming factor at 57.4 mW m⁻². The presentation outlines strategies to reduce aviation's climate footprint, including the use of alternative fuels, lean combustion technology, and contrail avoidance routing. Findings draw on data from recent aircraft measurement campaigns and observed emission reductions during the 2020 COVID-19 lockdown.

A 2021 EUROCONTROL presentation examines how COVID-19 devastated European aviation, with flights dropping as much as 88% below 2019 levels and airlines, airports, and air navigation service providers suffering €56.2 billion in net losses. The presentation outlines three recovery scenarios ranging from an optimistic return to 2019 traffic levels by 2024 (if vaccines proved effective quickly) to a prolonged recovery not expected until 2029 if vaccines failed. It frames the crisis as an opportunity to advance aviation sustainability, including reduced carbon emissions and noise impacts.

A December 2020 presentation by Public Health Seattle and King County researcher Kris Johnson, PhD, examines the link between airplane emissions and premature births. The slides outline serious health risks associated with preterm birth, including cognitive delays, hearing and vision problems, SIDS, ADHD, and greater likelihood of chronic diseases such as heart disease and diabetes in adulthood. Mothers who deliver preterm also face elevated risks of hypertension, cardiovascular disease, and repeated preterm deliveries.

A community member submitted comments to the Highline Forum on September 23, 2020, criticizing the PSRC Regional Aviation Baseline Study for failing to address social equity, environmental justice, carbon emissions, and impacts on non-aviation transportation. The commenter also challenged the Port's Environmental Excellence Awards, arguing that recognizing minor reductions like eliminating plastic straws is insignificant compared to the much larger carbon emissions produced by jet fuel during flights. The comments call on regional government agencies to align their aviation planning and recognition programs with meaningful climate and environmental justice goals.

At a September 2020 Highline Forum meeting, Federal Way resident Bernedine Lund argued that Sea-Tac Airport and the FAA are misleading the public about aircraft emissions by only measuring fuel use during takeoff and landing, while ignoring the far larger greenhouse gas output of full flights. She called on the Port and FAA to be transparent about the total global climate impact of aircraft using Sea-Tac. Her comments emphasized that environmental responsibility must extend beyond airport-specific operations to include the aircraft themselves.

A 2021 scientific study found that global aviation contributes a small but meaningful share of human-caused climate change, primarily through carbon dioxide emissions and the formation of contrail clouds at high altitude. The research, covering the years 2000 to 2018, found that non-CO2 effects such as contrails account for roughly two-thirds of aviation's total warming impact. The findings are relevant to ongoing policy discussions about reducing the climate footprint of air travel.

A peer-reviewed study by researchers from Tufts, UCLA, USC, and the University of Washington found that mothers living near airports and exposed to ultrafine particles from jet exhaust face elevated rates of preterm birth. The research, published in Environmental Health Perspectives in 2020, is particularly relevant to communities near large airports like Sea-Tac, where millions of residents live within the impact zone of aircraft emissions. The findings carry significant environmental justice implications, as near-airport communities with high pollution exposure are often among the most vulnerable populations.

The Stay Grounded network outlines 13 steps to reduce aviation's climate and community impacts, calling for a shift to trains and other low-carbon transport, an end to airport expansion, and the elimination of industry subsidies and tax breaks. The document highlights how airport noise, pollution, and land displacement disproportionately harm local communities and Global South populations who rarely fly. It also rejects carbon offsets and unproven technologies as false solutions, instead demanding binding emissions limits and democratic oversight of transport policy.