One of the most recognizable semi truck features are the vertical exhaust stacks. Other than looking cool, they also carry a ...

Like all engines, the exhaust fumes from a diesel-fueled variety have their own distinctive smell. Usually, a healthy diesel engine will smell of burnt diesel fuel and nothing else. However ...

P EOPLE ARE dying for clean air. According to the most recent estimates from the Institute of Health Metrics and Evaluation at the University of Washington, air pollution caused 4.7m early deaths ...

The Wichita Falls Professional Firefighters Association began contract negotiations with city officials Tuesday as ...