EPA’s National Clean Diesel Grants Program Pathway: Energy Efficiency, Conservation, and Fuel Switching in Transportation → Heavy-Duty Vehicles and Freight → Supporting Electric HDVs through Grants, Taxes, and RebatesJurisdiction: Executive Branch → Individual Agencies EPA’s National Clean Diesel Grants Program provides grants to government entities and nonprofits to assist owners in financing the retrofit, repowering, or replacement of certain HDVs.