This page contains tools and resources for conducting a greenhouse gas (GHG) inventory and developing a climate action related plan. Climate action planning is an iterative process that can be structured differently to achieve a variety of outcomes. For simplicity, the toolkit is framed around six steps, excluding environmental review. The following information provides links to relevant resources pertaining to each of the steps and is intended to support local governments as they navigate the climate action planning process. Please note: When local governments are developing a climate action plan or general plan with the intent of mitigating community-wide emissions or accomplishing CEQA streamlining, the resources on this webpage are intended to be used in coordination with CEQA Guidelines Section 15183.5(b) and the General Plan Guidelines.* 

Download a PDF of this guide here: 


Getting Started

Before starting the climate action planning process it may be useful to outline your planning document. The Statewide Energy Efficiency Collaborative (SEEC) provides local governments with a detailed Climate Action Plan Template  (free login required for all SEEC resources) including a sample baseline inventory spreadsheet. Over 55% of California local governments have already taken initiative on creating a climate action focused plan. To see who else is participating and to see examples of plans, check out the Office of Planning and Research’s (OPR) database of California jurisdictions addressing climate change.


ClearPath Tools Suite

The International Council for Local Environmental Initiatives (ICLEI) has developed an interactive web-platform that provides local governments with assistive climate action planning tools. ClearPath provides support for both municipal and community planning (see definitions of these under #1 below). While ClearPath does not create or replace a climate action plan, it can be used for most if not all of the technical calculations necessary for a plan. California local governments can register for free here. For local governments looking to perform their own calculations for development of a comprehensive plan, see the suggested resources below.


The CURB Tool

CURB or Climate Action for Urban Sustainability was developed by the World Bank in partnership with AECOM Consulting, Bloomberg Philanthropies and the C40 Cities Climate Leadership Group. CURB is an interactive tool that is designed specifically to help cities take action on climate by allowing them to map out different action plans and evaluate their cost, feasibility, and impact. As an Excel-based tool, CURB can be used offline and is free to use with no login or registration required.

#1 GHG Emissions Inventory

Establishing a baseline inventory of jurisdiction-wide greenhouse gas (GHG) emissions is the first step in climate action planning. This inventory is chosen for a select year, typically the most recent year in which sufficient data is available. This inventory allows local governments to quantify the GHG emissions they produce, identify major sources of emissions, and serve as a static reference to compare future emissions to. The resources listed below provide the methodology necessary for conducting a GHG baseline inventory at both the municipal and community scale. Resources for verifying and reporting these inventories are also included in this section.

Municipal Scope

Municipal inventories include all emissions associated with local government services and municipal operations which typically include:

  • Municipal buildings
  • Transit Fleet
  • Streetlights and traffic signals
  • Power generation facilities
  • Water delivery facilities
  • Municipal solid waste processing
  • Port facilities
  • Municipal wastewater processing
  • Airport facilities
  • Other process and fugitive emissions
  • Municipal vehicle fleet


The following resources provide a standardized set of guidelines and calculation methodologies for local governments to quantify GHG emission inventories from municipal operations.

Community Inventory Scope

The community inventory includes all emissions within the geographic area of a local government’s jurisdiction that are not included in the municipal inventory.


  • Residential and commercial building energy consumption
  • Solid waste disposal operation and processing
  • Transportation and mobile sources
  • Wastewater treatment and processing
  • Agriculture operations


The following resources provide a standardized set of guidelines and calculation methodologies for local governments to quantify GHG emission inventories for a community-wide scale.

Third-Party Inventory Verification

Local governments are recommended to have their inventories verified to ensure calculation accuracy. The following organizations provide third-party verification for both community and municipal inventories.

GHG Inventory Reporting Registries

Reporting your emissions provides many benefits including:

  • Transparency and accountability
  • Recognition as a climate leader
  • Connection with other cities around the world and GHG reduction strategy sharing networks


The following registries provide a global network for reporting and sharing GHG emission inventories.

*For tools that can be used to estimate emissions, please visit the Emission Calculators section of this document.

#2 Target Adoption

After conducting a baseline GHG inventory, local governments are encouraged to identify emission reduction goals and a timeline for meeting these goals. Information on recommended targets is listed in this section.


2030 and 2050 Targets

Local governments are encouraged to align their jurisdiction-wide reduction targets with statewide goals. California’s Senate Bill (SB) 32 mandates a statewide GHG emissions reduction of 40% below 1990 levels by 2030. Meeting this target will put California on track for achieving the 2050 target of reducing statewide GHG emissions to 80% below 1990 levels. To achieve these goals, ARB recommends local governments adopt a community-wide goal of reducing GHG emissions to 6 MTCO2e per capita by 2030 and 2 MTCO2e per capita by 2050. Another option is setting a mass reduction target for your local government’s service population, whichever is preferable.  

For more information please visit ARB’s AB32 scoping plan webpage and SEEC’s quick start guide on setting a GHG reduction target.

#3 Emissions Forecasting

Business-as-usual (BAU) forecasts use assumptions regarding trends and policies to project what annual GHG emissions will likely be in the future if no additional actions are performed. These projections allow local governments to quantify the GHG emissions reductions necessary for meeting adopted targets.  

Due to the inherently uncertain nature of forecasting, local governments are encouraged to perform multiple forecasts for a range of potential scenarios. This will allow local governments to look back to their forecasts in coming years to assess which scenario is most realistic, and adjust actions if necessary.

The ClearPath tools suite includes a comprehensive forecasting module that can be used to project various growth rates and account for regulatory standards. The CURB tool also provides various forecasting options that can be customized to target emissions and energy use from specific community sectors such as stationary energy, transportation, and waste.

Local governments looking to perform their own calculations can use completed climate action plans for guidance such as San Diego County’s forecast. Historical data inputs are typically necessary for most calculation methodologies. Listed below are suggested, sector specific data sources for projecting the various components included in a BAU forecast.  

Population Growth

Population growth estimates can be calculated using several datasets such as:

Electricity and Natural Gas Emission Factors

The carbon intensity of electricity generation depends on your electricity provider and projections are affected by ongoing state legislation. The Clean Energy and Pollution Reduction Act (SB350) currently require electricity providers, investor-owned utilities, and community choice aggregators to increase their procurement of renewable generated electricity to 50% by 2030. Thus the carbon intensity is expected to change relative to the target year.

Electricity and Natural Gas Consumption Growth Rate

Statewide projected electricity and natural gas consumption growth rates for both commercial and residential sectors can be found here:

Transportation Related

Transportation projections are best calculated using emission modeling tools such as the 2014 Emission Factors Model (EMFAC) web application. Please visit the Emission Calculators section of this document for more information.

#4 Strategy Selection

The next step in climate action planning is to determine GHG emissions reduction pathways for meeting the adopted targets. A broad range of strategies are available for reducing GHG emissions. Local governments are recommended to carefully go through a list of strategies to determine which will be the most practical and effective for their region.


When selecting reductions strategies it is important to consider the following questions:

  • Is the strategy technically feasible and can it realistically be implemented?
  • Does the strategy offer potential co-benefits (e.g. air quality, job opportunities, etc.)?
  • Could the success of this strategy be tracked (e.g. data availability)?


CURB’s Action Module allows you to select which sectors you would like to target based on your city’s authority to take action in each sector and a rapid assessment of the maximum impact potential and implementation feasibility of each strategy. Users are then given the opportunity to craft a scenario, customizing and bundling different strategies into a comprehensive plan. Detailed cost and impact assessments are calculated based on the information you provide. You can also go back and change the options which you have selected, either to drop or add new strategies or to change the anticipated deployment rate that will ultimately be achieved.


For a list of GHG reduction strategies visit:


The California Climate Action Portal Map (CAP-Map) is an open data tool developed by the California Air Resources Board to recognize local government climate action planning efforts across the state and to aggregate creative planning ideas for tackling climate change. Users can quickly access the climate action planning details of local jurisdictions including links to climate plans created, greenhouse gas (GHG) inventory information, GHG reduction targets, the local strategies planned to meet these targets, and more. The CAP-Map consists of both an interactive web map and a GHG reduction strategy search tool designed to assist local governments search for and compare GHG reduction strategies.

#5 Funding and Implementation

Staying on top of funding opportunities that can be used to supplement or cover proposed strategies is critical for putting proposed strategies into action. In addition to funding, reviewing best practice guidelines or case studies from other California local government can assist policymakers and planners maximize strategy effectiveness.

Find Funding

The Funding Wizard aggregates sustainable project funding opportunities from all over the web. Forms of funding include grants, loans, rebates, PACE financing, tax incentives, and more. Users can filter funding by project type, funding entity, and applicant type including funding for households and businesses too!

Implementation Guidelines & Best Practices

The following links provide guidelines and best practice case studies for many of the overarching GHG reduction strategy categories found through step #4. These resources can generally include specific on-the-ground steps for policymakers or planners to follow for implementation of both municipal and community focused strategies. *Resources in each category are sorted by date released or last updated.


Complete Streets & Bike/Ped Infrastructure


Electric Vehicles


Green Building Design


Green Business Promotion


Mixed-use and Infill Development


Open Space and Agricultural Land Preservation


Renewable Energy


Residential and Commercial Building Energy Efficiency


Transit Oriented Development


Transportation Demand Management


Urban Forestry


Waste Diversion


Water Reuse

#6 Monitoring and Tracking

The key to long-term success in climate action planning is to regularly monitor and track the progress of GHG emissions reduction strategies. Regularly conducting new emission inventories (step#1) is the best method to establish whether a local government is on track for meeting planned reduction targets (step #2). However, it is also important to monitor both the level of implementation and efficacy of the individual reduction strategies selected.


The first step to tracking individual strategies is to determine strategy-specific metrics that reflect GHG reduction progress. When determining the best tracking metric for each strategy it is important to consider data availability since this is most often a limiting factor. The following resources provide recommended tracking metrics for common GHG reduction strategies:

Secondly local governments are encouraged to create a repository for quantitatively tracking strategy progress and assign staff to regularly update this repository. Tracking can be performed in a simple Excel spreadsheet or using one of the user-friendly monitoring tools that have been created to assist local governments:

Emission Calculators and Modeling Tools

Many useful emission estimation tools are provided for free from various state agencies and organizations. These tools can be used for conducting baseline inventories, forecasting future scenarios, and monitoring ongoing GHG reductions. Listed below includes tools for quantifying GHG emissions specific to various sources.


Web Databases


Modeling programs

  • Parcel to city level urban forestry impacts from carbon sequestration and tree shading: i-Tree
  • GHG emissions associated with building construction and operations of various land use projects: CalEEMod
  • GHG emissions from solid waste management practices: Waste Reduction Model (WARM)

Mapping Tools

Additional Resources

- State of local climate action in California – ICLEI 2016 Report

- Training sessions on local government climate action - ICLEI 2020 Cohort Trainings

- Facility level GHG reporting guidelines – ARB Regulation Report

- Guidelines for corporations looking to conduct a GHG inventory – Corporate Standard

- International network of mayors, city representatives, and committees for climate action – C40 Cities

- Local government guide to the Paris climate agreements – ICLEI 2016 Report

- Summary for Urban Policymakers: What the IPCC Special Report on Global Warming of 1.5 Degrees C Means for Cities – IPCC 2018 Report

- The Carbon-Free City Handbook – Rocky Mountain Institute 2017 Handbook

- The Carbon-Free Regions Handbook – Rocky Mountain Institute 2018 Handbook

*For additional information regarding how climate change should be addressed in general plans or climate action plans with the intent of mitigating community-wide emissions or accomplishing CEQA streamlining please contact Erik de Kok at the Governor’s Office of Planning and Research (OPR) at 916-557-4711 or email at For other information related to OPR please contact the State Clearinghouse at (916) 445-0613 or

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