DIESEL CAR PENETRATION RAISES DURABILITY, SMOG CHECK QUESTIONS

The expected influx of diesel passenger vehicles and light-duty trucks beginning within a year or two in California is raising questions among regulators and environmentalists about potential negative air quality impacts that may result from faulty new technology and a current exemption for diesels in the state's Smog Check program. These issues may eventually be reviewed by lawmakers for regulatory changes, sources speculated. Though encouraged by advances in diesel engine technology and particulate filters to dramatically reduce emissions, regulators and...