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  2. Life-cycle greenhouse gas emissions of energy sources

    en.wikipedia.org/wiki/Life-cycle_greenhouse_gas...

    The scale uses the global warming potential unit, the carbon dioxide equivalent (CO 2 e), and the unit of electrical energy, the kilowatt hour (kWh). The goal of such assessments is to cover the full life of the source, from material and fuel mining through construction to operation and waste management.

  3. Emission intensity - Wikipedia

    en.wikipedia.org/wiki/Emission_intensity

    An emission intensity (also carbon intensity or C.I.) is the emission rate of a given pollutant relative to the intensity of a specific activity, or an industrial production process; for example grams of carbon dioxide released per megajoule of energy produced, or the ratio of greenhouse gas emissions produced to gross domestic product (GDP).

  4. Carbon accounting - Wikipedia

    en.wikipedia.org/wiki/Carbon_accounting

    In the context of GHG accounting, RECs are often used to adjust estimated Scope 2 emissions. In a typical case, a company would calculate its Scope 2 emissions using its electricity consumption and a grid emissions factor. Companies that purchase RECs can use them to lower the average emissions factors included in their inventories.

  5. Greenhouse gas inventory - Wikipedia

    en.wikipedia.org/wiki/Greenhouse_gas_inventory

    These tiers indicate which method of emissions calculations is used from the IPCC 1996 Guidelines. [12] Activity GHG IPCC Tier Method used to estimate emissions Public electricity and heat production: CO 2: 2: An emissions factor is applied to fuel consumption data from DUKES. Some data are also collected from individual point sources at ...

  6. Kaya identity - Wikipedia

    en.wikipedia.org/wiki/Kaya_identity

    The Kaya identity is a mathematical identity stating that the total emission level of the greenhouse gas carbon dioxide can be expressed as the product of four factors: human population, GDP per capita, energy intensity (per unit of GDP), and carbon intensity (emissions per unit of energy consumed).

  7. 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 ...

  8. Emission inventory - Wikipedia

    en.wikipedia.org/wiki/Emission_inventory

    An emission inventory (or emissions inventory [1]) is an accounting of the amount of pollutants discharged into the atmosphere.An emission inventory usually contains the total emissions for one or more specific greenhouse gases or air pollutants, originating from all source categories in a certain geographical area and within a specified time span, usually a specific year.

  9. Greenhouse gas emissions - Wikipedia

    en.wikipedia.org/wiki/Greenhouse_gas_emissions

    Emissions of carbon dioxide, methane and nitrous oxide in 2023 were all higher than ever before. [6] Electricity generation, heat and transport are major emitters; overall energy is responsible for around 73% of emissions. [7] Deforestation and other changes in land use also emit carbon dioxide and methane.