Researchers at the University of Arizona have won a $1.4 million grant to study the occupational and environmental health effects of underground mining equipment that runs on biodiesel-blend fuels.

The university says mining operators are shifting from diesel to biodiesel-blend fuels in a bid to lower exposure to pollutants.

Biodiesel is made from vegetable oil or animal fat and can be added to diesel as a blend or used on its own.

The National Institute for Occupational Safety and Health awarded the grant to the university’s public health college and mining department.

Senior Editor, News, Arizona Daily Star, Tucson, Az.