## Search Emission Metrics

This tool returns emission metrics associated with your query. An emission metric is an estimate of a quantity of pollutant emitted within defined geographic, temporal, sectoral, and/or procedural boundaries. Air pollutant inventories, including those found in this Portal, typically feature the following parameters: Place (country or state/province/territory); Year (or range of years); Pollutant (or pollutant family); Source Category (or subcategory); and Estimation Methodology. Note: Fuel (another key parameter) is not included at this time, because it is not well-defined in the available inventories.

The parameters included in each inventory are shown in the Inventory Overview table below.

Select from the parameters below to refine your search. To ensure that your query returns results, refer to the Inventory Overview table to select parameters that are compatible with one another. Note: When selecting a Source Category or Estimation Methodology, we recommend that you click on the “i” icons for more information.

Select the year or years of interest for your search.

Select one or more country, province, state, or territory of interest.

Select one or more pollutant, or pollutant group, of interest.

Select from the list of source categories below if you wish to refine your search by emitting activity or economic sector.

Select from the list below if you wish to further refine your search by estimation methodology.

## Search Places

Use the links below to select countries, states, provinces, or territories.

North American Countries

United States

American States

Mexico

Mexican States

## Search Pollutants

A pollutant is a chemical or agent present in the atmosphere that may contribute to climate change or become hazardous to human health.

All pollutants

Black carbon (BC) and related pollutants

Criteria air contaminants (CAC)

Greenhouse gases (GHG)

Short-lived climate pollutants (SLCP)

Select from either the list of source categories or the list of estimation methodologies below to see the associated pollutant(s). Clicking on a pollutant name will redirect you to the inventory(ies) that have associated pollutant data.

Select from the list of source categories below if you wish to refine your search by emitting activity or economic sector.

Select from the list below if you wish to further refine your search by estimation methodology.

## Search Source Categories

A source category is a classification of emissions by emitting activity or economic sector.

CRF 2006 Source Categories

Use this search tool to obtain data for a selected source category, by selecting from either the list of guidance documents or the list of pollutants below.

Select one or more pollutant, or pollutant group, of interest.

## Search Estimation Methodologies

An estimation methodology is a method and/or algorithm used to estimate the total emissions of one or more pollutants resulting from an emitting activity.

Revised 1996 IPCC Guidelines

2006 IPCC Guidelines

Use this search tool to obtain estimation methodologies for a selected Source Category or Pollutant.

Select from the list of source categories below if you wish to refine your search by emitting activity or economic sector.

Select one or more pollutant, or pollutant group, of interest.

From 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 3, Chapter 4, Equation 4.22.
http://www.ipcc-nggip.iges.or.jp/public/2006gl/vol3.html

### Equation

${E}_{\text{CO2}}=\left(\mathrm{GA}-{H}_{w}-\mathrm{BA}-\mathrm{WT}\right)●\frac{44}{12}$

### Equation Definitions

${E}_{\mathrm{CO2}}$ = CO2 emissions from pitch volatiles combustion, tonnes CO2

$\mathrm{GA}$ = initial weight of green anodes, tonnes

$\mathrm{Hw}$ = hydrogen content in green anodes, tonnes

$\mathrm{BA}$ = baked anode production, tonnes

$\mathrm{WT}$ = waste tar collected, tonnes

### Emission Metrics Using CO2 Emissions from Pitch Volatiles Combustion (Aluminium Production)

Inventory Year Place Source Category Pollutant Value

### Current Inventories Using CO2 Emissions from Pitch Volatiles Combustion (Aluminium Production)

Inventory Type of Pollutant Time Period Publication Date

### Current Source Categories Using CO2 Emissions from Pitch Volatiles Combustion (Aluminium Production)

Guidance Document Source Category