More U.S. college students are looking into careers in alternative energy, leading U.S. universities to add new courses on clean energy technologies and the environment, MSNBC reports.

The number of Berkeley undergraduates enrolled in introductory energy courses has almost tripled and a new graduate class in solar photovoltaics signed up 70 students, the largest course in recent memory at U.C.’s College of Engineering.

Stanford University’s Petroleum Engineering Department has renamed itself the Energy Resources Engineering Department. The Department of Civil and Environmental Engineering has offered courses in green architecture and sustainable development.

Other U.S. schools targeting green technologies and eco-friendly programs include Middlebury College, Harvard University, Dartmouth College, Williams College, Illinois State University, and the University of California at Davis.