Public Investigator asked the Department of Transportation why tests are still required, and what options exist for people ...

Public Investigator asked the Department of Transportation why tests are still required, and what options exist for people whose cars don't pass.

If you've taken a close look at the shiny exhaust tips on some new cars, you may have noticed that there isn't anything ...

A new real-time monitoring system captures minute-by-minute changes in toxic metals resulting from traffic pollution.

When President Donald Trump signed legislation to revoke California’s authority to enforce stricter tailpipe emissions ...

In hot weather, those systems pump a “geothermal fluid” — generally a refrigerant like in an air conditioner — to pick up ...

Through the CAA, the state sets more stringent tailpipe emission standards than what the Environmental Protection Agency requires nationally.

Introduction: A Growing Focus on Agricultural Emissions. While Small Engines Market is typically analyzed through the lens of ...

Advisory Circular (AC) 34-1, Fuel Venting and Exhaust Emission Requirements for Turbine Engine Powered Airplanes, has been written to provide section-by-section guidance on 14 CFR Part 34.