NEPA and Climate Change

ICF International combines deep subject matter expertise and thought leadership in both environmental impact and climate change analysis.



As greenhouse gas (GHG) emissions and climate change impacts become a more frequent and critical subject for National Environmental Policy Act (NEPA) environmental impact analysis, ICF can assist clients with preparing thorough, accurate, and legally defensible analyses. ICF has extensive practical experience with the requirements of all major U.S. federal and state environmental laws and regulations and routinely prepares environmental impact assessment documents for many different federal agencies under NEPA.

ICF has expertise in all aspects of environmental management and is routinely called upon to complete analyses on significant, complex, and high-profile projects, such as the National Highway Traffic Safety Administration (NHTSA) Corporate Average Fuel Economy Standards Environmental Impact Statement (EIS), which included—for the first time ever in a NEPA analysis—modeling of a federal action’s incremental effects on global climate change impacts. Our work includes:

  • Preparing EIS documents for landmark federal projects
  • Integrating climate change analysis into NEPA documents
  • Measuring and analyzing GHG emissions
  • Modeling global climate change impacts
  • Analyzing global climate change impacts on resources
  • Assessing the life-cycle GHG emissions of a federal action
  • Developing climate change mitigation and adaptation strategies
  • Training practitioners on how best to integrate climate change into NEPA analyses

ICF offers a full spectrum of climate services, from GHG emissions measurement and mitigation to climate impacts assessment. We have expertise across the full range of project types—energy, land use and resource management—and climate-sensitive sectors, such as energy, water, and transportation infrastructure; health; ecosystems; agriculture; and forestry. We have worked on these issues for a variety of public and private sector clients as well as key federal agencies and the U.S. Global Change Research Program.


Featured Resources

  • Integrate climate change analysis into NEPA analyses—ICF takes a methodical and transparent approach to including potential climate change impacts in our NEPA analyses. We analyze the global and project-area specific context for potential climate change impacts as well as the effects of climate change on relevant resources and resource uses.

  • Measure and analyze GHG emissions—ICF advises public and private-sector clients on how to quantify, track, report, and reduce GHG emissions and how to develop comprehensive climate change strategies that facilitate broader planning, communication, and implementation objectives. We have earned an outstanding reputation in the field of climate change for our analytical rigor, state-of-the-science approaches, and technical integrity through hundreds of assignments for a range of clients.

  • Analyze climate change impacts on resources—ICF's expertise on climate change impacts spans all sectors influenced by climate change, including the built environment, agriculture, forestry, human health, coastal resources, recreation, sensitive ecosystems, and water resources. We help decision makers anticipate the potential impacts of climate change on infrastructure, ecosystems, and communities, and plan accordingly. This includes modeling incremental effects on infrastructure and operations, assessing vulnerabilities and identifying opportunities, evaluating options for adaptation, engaging stakeholders effectively through pilots and workshops, and developing adaptation strategies that decrease costs, increase benefits, and accommodate a continually evolving landscape.

  • Address climate change adaptation—ICF's adaptation expertise spans all sectors influenced by climate change. ICF helps clients identify and prioritize cost-effective risk management strategies in anticipation of climate change, with a focus on pragmatic approaches that embed adaptation as an element of existing planning and resource management frameworks.

  • Address climate change mitigation—ICF estimates GHG emissions and develops mitigation strategies for both government and private clients. We provide modeling and analytical support to assess the cost effectiveness of proposed options for reducing emissions in a variety of areas, including energy efficiency, renewable energy, transportation, and supply chains. Our comprehensive knowledge of the climate change policy landscape supports efforts to minimize costs and liabilities, maximize value, and make high-stakes investment decisions by modeling regulatory and policy scenarios for GHG and conventional pollutants; providing guidance with existing and potential climate change regulations, laws, and standards; and tracking environmental performance.
  • Canadian Climate Change Process
  • California Air Pollution Control Officers Association (CAPCOA)
  • California Climate Change Action Registry
  • California State Department of Transportation
  • City of Los Angeles, California 
  • Intergovernmental Panel on Climate Change (IPCC)
  • Midwestern Governors’ Association
  • National Park Service (NPS)
  • Puget Sound Clean Air Agency, Washington
  • Regional GHG Gas Initiative (RGGI)
  • San Bernardino, Monterey, and San Joaquin Counties, California
  • The World Bank
  • U.S. Agency for International Development (USAID)
  • U.S. Department of Energy (DOE)
  • U.S. Department of Homeland Security
    • Federal Emergency Management Agency (FEMA)
  • U.S. Department of Interior
    • Bureau of Land Management (BLM)
  • U.S. Department of Transportation (DOT)
  • U.S. Environmental Protection Agency (EPA)
  • Washington State Department of Transportation
  • Western Climate Initiative (WCI)
  • Western Governors’ Association

Contact Info

info [at] icfi [dot] com

+1.703.934.3603 or +1.800.532.4783

9300 Lee Highway, Fairfax, VA 22031-1207 USA

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9300 Lee Highway, Fairfax, VA.