The University of Iowa is getting high marks for being environmentally minded. The Environmental Protection Agency recently honored the Big Ten school as being one of the top 20 organizations which runs on its own green power. The Universitys Liz Christiansen says they strive to integrate renewable energy and sustainability with education. One hallmark of the Universitys green program is the use of oat-based hulls in its boilers. The oat hulls reduce the amount of CO2 emissions and remove the need to use coal.