Researchers have created a prototype that can be fitted into tailpipes of cars, helicopters and unmanned aerial vehicles ...

During normal operation, the emissions from a car's tailpipe should be invisible ... On turbocharged vehicles, the presence of bluish-gray exhaust smoke may indicate turbocharger failure ...

The exhaust tips of a diesel truck have a similar function to the muffler tips of a gasoline vehicle. It routes the ... the temperature as it passes the tailpipe. Without those vents, the exhaust ...