A non-profit research center operating within academic surroundings, West Virginia University's Center for Alternative Fuels, Engines and Emissions (CAFEE) is renowned for its system of successfully measuring exhaust emissions of both conventional and alternative-fueled engines, as well as heavy-duty vehicles.

CAFEE is a worldwide leader in the research and development of the concepts and technologies necessary to improve transportation and power system efficiency, while working toward a cleaner environment. CAFEE believes combining energy innovation with environmental responsibility is essential to creating and maintaining a successful economy. The center is a $4 million annual enterprise within the College of Engineering and Mineral Science's Advanced Energy Initiative and consists of seven faculty members, five full-time staff engineers, five technicians, and more than 30 Ph.D. and M.S. graduate students. The CAFEE staff works extensively on emission reduction research — particularly engine technologies, post-combustion technologies, after-treatment evaluation, and fuel technologies.