But, if your vehicle fails the test, it can be frustrating ... to run for 20 minutes prior to a SMOG check, you could end up failing. A cold engine doesn't only effect combustion, it also doesn ...

It would take years for scientists to piece together the puzzle of this Los Angeles smog and decades to implement policies to improve the air we all breathe. Today, scientists are able to monitor the ...

the smog check exemption is for cars model years 1975 and older, which has been the standard since 2005. Under the new proposal, any car 35 years old or older would be exempted as well. But only ...