Annual Emission Constraints

The document describes the functionality of annual emission constraints in LEAP, noting they are used to set maximum annual pollutant levels across an energy system during least cost optimization of a Transformation module.

• Annual emission constraints in LEAP are only applicable and relevant when running scenarios that utilize least cost optimization of a Transformation module; they are ignored in scenarios calculated without these optimization calculations.
• The purpose of emission constraints is to define a maximum annual emission level for a specific pollutant, which LEAP then uses to determine the least cost configuration of a Transformation module to keep total system-wide emissions below that limit.
• While pollutant emissions can originate from Demand sectors, Transformation modules, and Non energy sectors, LEAP's optimization calculations typically only operate on a single Transformation module, such as the electric generation module.

APA

Stockholm Environment Institute (n.d.). Annual Emission Constraints. https://cdn.leap.sei.org/help24/Transformation/Emission_Constraint.htm

Chicago

Stockholm Environment Institute. Annual Emission Constraints. n.d. https://cdn.leap.sei.org/help24/Transformation/Emission_Constraint.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Annual Emission Constraints |url=https://cdn.leap.sei.org/help24/Transformation/Emission_Constraint.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendannual, author = {{Stockholm Environment Institute}}, title = {{Annual Emission Constraints}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/help24/Transformation/Emission_Constraint.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }