The California Air Resources Board (CARB) has streamlined the process for propane autogas and natural gas vehicle upfits through approving changes to its rules. This brings the process closer to requirements of the US Environmental Protection Agency. Peter Ward of Alternative Fuels Advocates would like to see the process go further, where adjustments to the [...]The Article CARB Streamlines Propane and NGV Upfits In Line with EPA appeared first on Automotive Digest.