Oklahoma's largest universities earned average scores on an annual college sustainability report card released Tuesday.
Oklahoma State University earned a B-, a score that shows continued improvement during the past few years.
The University of Oklahoma earned a C, a score that shows no improvement.
The University of Tulsa, Oklahoma's only other school featured in the report, earned a C.
The Sustainable Endowments Institute surveyed 300 schools with the highest endowments, as well as 22 other schools that asked to be included. Schools were evaluated based on nine factors that include climate change and energy, green building and investment priorities. Scores were determined by public information and surveys that school officials and student groups submitted.
Fifty-two schools that earned an overall A or A- on the report are considered college sustainability leaders.
Overall, schools have shown significant improvement during the past five years, according to the report. The economy likely caused some schools to explore more energy-
OSU's grade has improved each of the past three years, from a D+ to a B-.
Stephen McKeever, vice president for research and technology transfer, said the university has been taking a variety of steps to improve sustainability efforts and curb energy consumption. Initiatives include starting a farmer's market and encouraging students to use reusable cups at dining locations on campus. Sustainability coincides with OSU's land-grant mission, McKeever said.
This year marks the second consecutive year OU and Tulsa earned Cs on the report card.
In an e-mail statement, David Hamby, director of university relations at Tulsa, said the university strives to operate in a way that will help preserve resources for future generations. Any new construction work, including selection of materials and design, is done with a consideration for energy conservation, Hamby said.
Tulsa's grade had improved each year until this year. OU's grade dropped slightly from a C+ two years ago.
AT A GLANCE
What Oklahoma schools are doing