Carnegie Mellon University in Pittsburgh says it is buying renewable energy credits to offset 100 percent of its electric consumption for 2012.

The institution will purchase 116,000 megawatt hours of Green-e certified renewable energy credits from Renewable Choice Energy. The power supported by the credits is sourced from wind farms in the Midwest. The green power bought by the university will offset nearly 80,000 metric tons of carbon dioxide emissions.

Carnegie Mellon made its first purchase of wind power in 2001, when it bought an amount representing 5 percent of the university’s electricity usage. In subsequent years, the school has increased the amount of green energy it has purchased.

"Carnegie Mellon is committed to sustainability in education, research and our own practices," says university president Jared L. Cohon.