TED Expressions

This guide explains how to specify environmental loadings in the Technology Emissions Database (TED), detailing the use of constant numeric values versus mathematical expressions based on fuel chemical composition to ensure accurate emission calculations in LEAP scenarios.

• Environmental loadings in TED can be defined as either constant numeric values or as mathematical expressions based on the chemical composition of fuels being produced or consumed.
• Using mathematical expressions for emission factors allows calculated loadings in LEAP scenarios to reflect specific fuel characteristics, such as the carbon content of coal in a local area. An example expression for CO2 loading is: Loading (kg CO2 / kg of fuel consumed) = CarbonContent * FractionOxidized * (CO2/ C).
• Basing environmental loadings on the LEAP fuels database provides two primary advantages: loadings are automatically updated when the fuels database is updated, and a single default set of effects can be applied across different regions with varying fuel compositions.

APA

Stockholm Environment Institute (n.d.). TED Expressions. https://leap.sei.org/help24/TED/TED_Expression_Builder.htm

Chicago

Stockholm Environment Institute. TED Expressions. n.d. https://leap.sei.org/help24/TED/TED_Expression_Builder.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=TED Expressions |url=https://leap.sei.org/help24/TED/TED_Expression_Builder.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendted, author = {{Stockholm Environment Institute}}, title = {{TED Expressions}}, institution = {Stockholm Environment Institute}, url = {https://leap.sei.org/help24/TED/TED_Expression_Builder.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }