Authorizes the department of ecology to require persons who produce or distribute fossil fuels to comply with emission standards or emission limits on emissions of greenhouse gases from those fossil fuels when the fossil fuels are used in this state.

Modifies the Washington clean air act regarding the emission credits banking program; requirements to report emissions of greenhouse gases where the emissions are from fossil fuels sold in this state by a single supplier; and adoption of rules on certain emissions of carbon dioxide, methodologies established to ensure that emissions occurring outside of this state are not reported to the department, requiring a person to use a specific method to complete their report, and requiring persons to have a third party verify their report.