The check engine light came on in my 2003 Lexus ES300, so I took it to my mechanic. He scanned it and the code indicated it was the evaporative emissions system. He then did a “smoke test” and saw ...

In the United States, 31 of the 50 states require an emissions test (commonly referred to as a smog test) in order to register the vehicle within their respective states. These tests are generally ...

Unwilling to impose a robust in-service emission testing regime like other OECD countries, the New Zealand government has chosen to monitor the exhaust emissions of “our third-world vehicle fleet” in ...

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This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. ST. LOUIS, Mo. — Vehicle emissions testing ...

Scientists have developed an advanced model that can help predict pollution caused by wildfire smoke. The research provides a physical model that can more reliably predict soot and smoke emissions ...

I got an invitation from the state of Illinois recently to report for an emissions test. I hadn’t had one in a few years, so I was understandably nervous. I hadn’t studied for the test either. There ...