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The emissions information in eGRID include carbon dioxide (CO 2), nitrogen oxides (NO x), sulfur dioxide (SO 2), mercury (Hg), methane (CH 4), nitrous oxide (N 2 O), and carbon dioxide equivalent (CO 2 e). CO 2, CH 4, and N 2 O are greenhouse gases (GHG) that contribute to global warming or climate change.
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.
The carbon footprint explained Comparison of the carbon footprint of protein-rich foods [1]. A formal definition of carbon footprint is as follows: "A measure of the total amount of carbon dioxide (CO 2) and methane (CH 4) emissions of a defined population, system or activity, considering all relevant sources, sinks and storage within the spatial and temporal boundary of the population, system ...
Scope 2 covers indirect GHG emissions from consumption of purchased electricity, heat, cooling or steam. [50]: 27–29 As of 2010, at least one third of global GHG emissions are Scope 2. [51] Scope 3 emission sources include emissions from suppliers and product users (also known as the "value chain").
The carbon footprint measurements should include 100% of Scope 1 and Scope 2 emissions, plus all Scope 3 emissions that contribute more than 1% of the total footprint.
The ISO 14064-3 verification standard is one of the standards accepted by the Carbon Disclosure Project, the widely used climate impact disclosure system, as a valid framework for measuring and reporting GHG emissions. [2] The principles behind ISO 14064 have been used in national calculation methodologies such as the UK's Carbon Trust Standard ...
Additionally, the treatment of emissions results in residues that require proper handling for recycling or final disposal (for instance, the pollution abatement process of sulfur dioxide involves its conversion into gypsum or sulfuric acid). To address these complexities, Nakamura and Kondo extended the standard EEIO model by incorporating ...
For example, to estimate emissions from the energy sector (typically contributing over 90% of CO 2 emissions and 75% of all GHG emissions in developed countries) the quantity of fuels combusted is combined with an emission factor - the level of sophistication increasing with the accuracy and complexity of the emission factor. [3] Table 2 ...
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