The Billion Dollar Green Challenge -- an initiative of the Sustainable Endowment Institute that promotes green Revolving Funds (GRFs) on college and university campuses -- was featured on NPR's Marketplace this morning.

In the interview, SEI Executive Director, Mark Orlowski, explains how endowments can invest in GRFs as part of their investment strategy without worry about donor restrictions on the funds. Done properly, these investments can help campuses avoid substantial costs by upgrading to more efficient technologies and improving design to lower demand for energy. Over the years, these savings can add up to significant returns on the original investments -- Harvard is saving $5 million a year as a result of their GRF projects. 

Listen to the 2 minute interview on Marketplace's website: How to grow green energy along with endowments. 

Visit www.greenbillion.org to more about the Billion Dollar Green Challenge and the 43 institutions that are participating to date.