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  2. GREET Model - Wikipedia

    en.wikipedia.org/wiki/GREET_Model

    The GREET model is specified in the Inflation Reduction Act of 2022 §45V [2] as the methodology to calculate the life cycle greenhouse gas emissions "through the point of production (well-to-gate)" when determining the level of tax credit for clean Hydrogen production until a successor is approved by the Secretary of the Treasury. The final ...

  3. Carbon footprint - Wikipedia

    en.wikipedia.org/wiki/Carbon_footprint

    A carbon footprint (or greenhouse gas footprint) is a calculated value or index that makes it possible to compare the total amount of greenhouse gases that an activity, product, company or country adds to the atmosphere. Carbon footprints are usually reported in tonnes of emissions (CO 2-equivalent) per unit of comparison.

  4. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    In-use vehicles in the specified categories must meet 1997/98 emission standards for the respective new vehicle type (in the case of heavy duty engines NO x = 4.5 g/kWh, PM = 0.25 g/kWh). In other words, the 1997/98 new vehicle standards are retroactively applied to older vehicles already on the road. Vehicle owners have two methods to comply:

  5. Worldwide Harmonised Light Vehicles Test Procedure

    en.wikipedia.org/wiki/Worldwide_Harmonised_Light...

    The set-up process for vehicles ahead of the test. The last two are stricter than in the NEDC protocol, since they were previously used by car manufacturers to their advantage to keep CO 2 values (legally) as low as possible. [11] The procedure does not indicate fixed gear shift point, unlike the NEDC, letting each vehicle use its optimal shift ...

  6. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    Vehicle manufacturers were a percentage of their fleet meeting these ZEV standards over a long-term schedule (2% by model year 1998 at its start), [31] but the mandate schedule has shifted based on the unplanned rate of technology advancement and costs, and as of 2020, its current target is to reach 8% ZEV by 2025 determined by fleet credits ...

  7. Exhaust gas - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas

    United States Light-Duty Vehicle, Light-Duty Truck, and Medium-Duty Passenger Vehicle—Tier 2 Exhaust Emission Standards (for Bin 5) [4] Component Emission Rate Annual pollution emitted NMOG (Volatile organic compounds) 0.075 grams/mile (0.046 g/km) 2.1 pounds (0.95 kg) Carbon Monoxide 3.4 grams/mile (2.1 g/km) 94 pounds (43 kg) NO X

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