; and (8) airports are a large source of air pollution and contribute to poor air quality in the neighborhoods surrounding the airports, leading to worse health outcomes for those who live in those neighborhoods. 3. Definitions (a) In general In this Act: (1) Administrator The term Administrator means the Administrator of the Environmental Protection Agency. (2) Calculated greenhouse gas emissions The term calculated greenhouse gas emissions , with respect to aviation fuel, means the aggregate net lifecycle greenhouse gas emissions of the fuel or mix of fuels consumed by a flight where all fuels, except the consumed fuels that are sustainable aviation fuels, are considered to have the net lifecycle greenhouse gas emissions of traditional jet fuel. (3) Estimated flight time (A) In general The term estimated flight time , with respect to a flight that has not yet terminated, means the period that the operator of the flight reasonably anticipates will be the real flight time. (B) Exclusion The term estimated flight time does not include any period during which the aircraft used for the flight is anticipated to spend taxiing to a gate, standing at a gate, or otherwise remaining grounded. (4) Greenhouse gas The term greenhouse gas has the meaning given the term in section 137(d) of the Clean Air Act ( 42 U.S.C. 7437(d) ). (5) Net lifecycle greenhouse gas emissions The term net lifecycle greenhouse gas emissions , with respect to aviation fuel, means the net quantity of greenhouse gas emissions related to the full fuel lifecycle, where the mass values for those greenhouse gas emissions are adjusted to account for the relative global warming potential of each greenhouse gas, as determined by the Administrator in accordance with the most recent Carbon Offsetting and Reduction Scheme for International Aviation that has been adopted by the International Civil Aviation Organization with the agreement of the United States. (6) Qualifying flight (A) In general The term qualifying flight means a flight that— (i) originates