We welcome your comments and ideas whether you are new to California Climate Investments, have received project funding in the past, or are an interested party. View featured public participation opportunities and open comment periods below.
Quantification Methodologies and Calculator Tools for Estimating the Greenhouse Gas Benefits of Affordable Housing Projects
Public comment due September 29, 2026
CARB is accepting comments on quantification methodologies that estimate greenhouse gas (GHG) and air pollution emissions reductions and from affordable housing projects. Quantification methodologies document the formulas used to calculate program benefits. Benefit calculator tools use formulas from the quantification methodologies to estimate benefits.
The Housing Development and Finance Committee (HDFC) proposes to use the Affordable Housing Quantification Methodology and Calculator Tool to determine eligibility for funding for Affordable Housing and Sustainable Communities Program (AHSC) – Housing Component. Projects that show a reduction in greenhouse gas emissions as an output of project location and other information will be eligible for AHSC housing funding and receive a boost in scoring tiebreaker. Data from the Calculator Tool will also be used for reporting the AHSC program’s expected benefits in the California Climate Investments Annual Report to the Legislature.
Draft Affordable Housing Quantification Methodology
Draft Affordable Housing Benefits Calculator Tool
Submit public comment at ggrfprogram@arb.ca.gov
California Climate Investments Draft Supplemental Guidance to Avoid Substantial Burdens or Harms to Priority Populations
Public comment extended to September 15, 2026
The Supplemental Guidance to Avoid Substantial Burdens or Harms to Priority Populations (Supplemental Guidance) provides State agencies that administer California Climate Investments with strategies and resources to identify and avoid burden or harm in program design and project selection, where possible. The Supplemental Guidance is open for public comment until September 15, 2026.
Download the Supplemental Guidance.
Submit public comment at ggrfprogram@arb.ca.gov
To learn more, ask questions, and provide feedback regarding the draft Supplemental Guidance, CARB is hosting two office hours open to the public:
Avoiding Burdens Office Hour #1
Wednesday, September 9, 2026 11:00am – 12:00pm
Avoiding Burdens Office Hour #2
Monday, September 14, 2026 2:00pm – 3:00pm
Technical Review and Community Feedback for California Climate Investments Quantification Methodologies
California Climate Investments in partnership with scholars from the Institute for Social Transformation at the University of California, Santa Cruz, is working to improve the development and update process of quantification methodologies that estimate the greenhouse gas (GHG) emissions reductions and co-benefits from funded projects.
CARB and UCSC-IST are convening technical and community experts on Technical Review Teams and Community Insight Teams, respectively, to help ensure that California Climate Investments quantification methodologies reflect the best methods and latest science, as well as community realities and equity principles.
Solicitation for Technical and Community Experts to guide California Climate Investments Quantification Methodologies
Applications due by August 31, 2026, by 5 P.M. Pacific Standard Time.
We are looking for technical experts to serve on a Technical Review Team and individuals with community leadership, advocacy, or lived experience to serve on a Community Insight Team! Specifically, the Technical Review Team and Community Insight Team will provide guidance on methods that quantify the GHG emissions reduction benefits of biochar application to California croplands to support sustainable agriculture projects.
See the Technical Review Team Solicitation (En Español) and Community Insight Team Solicitation (En Español) for more information and to apply for this paid opportunity.
Upcoming Events
Visit the California Climate Investments events calendar to learn about upcoming participation opportunities.
Open Comment Periods
Contact the GGRF Program to provide comments or ask questions.