It's not easy being green ... unless you're Penn, in which case you are sipping ice tea like Kermit the Frog.
Penn topped the Environmental Protection Agency's list of 30 colleges that use the most green energy. No other Ivy League schools made the list, which is updated quarterly, while neighboring Drexel placed No. 8 on the list.
Penn used over 200 million kilowatt-hours of green energy, nearly 50 million more than No. 2 Georgetown.
The list will be updated again on April 27.
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