Sustainability
Airport noise: why a daily average is not a single flyover
Understanding exposure periods and night weighting helps read airport noise reporting.
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Sustainability
Fuel, climate science and operational measures affecting aviation’s environmental transition.
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- How lifecycle accounting changes the SAF emissions claim
Sustainable aviation fuel is assessed across its supply chain, not only at the aircraft exhaust.
- Sustainable aviation fuel: the economics behind the promise
SAF can work within today’s aircraft and fuel systems, but supply, feedstocks and price determine how quickly it scales.
- SAF book-and-claim: how an environmental attribute travels without the fuel
Physical sustainable aviation fuel can enter one airport while its verified emissions benefit is assigned to a buyer elsewhere.
Sustainability
Ground power and the APU: how parked aircraft use energy
Electrical power, cabin air and propulsion are different services.
Sustainability
Emissions intensity and total emissions: two different questions
A lower emission rate per passenger-kilometre can coexist with a higher total.
Sustainability
How lifecycle accounting changes the SAF emissions claim
Sustainable aviation fuel is assessed across its supply chain, not only at the aircraft exhaust.
Sustainability
SAF book-and-claim: how an environmental attribute travels without the fuel
Physical sustainable aviation fuel can enter one airport while its verified emissions benefit is assigned to a buyer elsewhere.
Sustainability
Contrail forecasting: the next layer of climate-aware flight planning
Some persistent contrails form only in cold, ice-supersaturated air, creating an opportunity to test small altitude changes.
Sustainability
Sustainable aviation fuel: the economics behind the promise
SAF can work within today’s aircraft and fuel systems, but supply, feedstocks and price determine how quickly it scales.
Sustainability
Comparing aviation climate claims
Use the full boundary
Aircraft fuel burn, lifecycle emissions from fuel production and non-CO₂ effects answer different questions. A lower lifecycle figure for a fuel does not mean a flight has no exhaust emissions.
Check the accounting
For sustainable aviation fuel claims, look for the feedstock, certification, lifecycle method and safeguards against double counting. Fleet renewal and operational efficiency should be evaluated against a clear baseline.
Questions about this topic
Does lower emissions intensity mean lower total emissions?
Not necessarily. A lower amount per seat-kilometre can coexist with more total traffic. Compare the same lifecycle boundary, occupancy assumption and period, and distinguish CO₂ from wider climate effects.
Does quieter mean lower carbon emissions?
Noise and climate are separate impacts. A noise footprint, a peak level and daily exposure are also different measures. Read each claim’s units, baseline and local context.