The town of Warren may allow excise tax exemptions of up to $100 for qualified AFVs registered in Warren. Qualified vehicles must be primarily fueled with one of the following: an electric motor drawing current from rechargeable batteries or fuel cells; gas produced from biomass, where biomass is defined as any organic material other than oil, natural gas, and coal; liquid, gaseous or solid synthetic fuels produced from coal; or coke or coke gas.