05/08/2009 05:12 am ET | Updated May 25, 2011

New York Greening The Empire State Building For $20 Million

In a news conference today, NYC Mayor Michael Bloomberg will appear with Bill Clinton to give details of the $20 million retrofit, which will reportedly include replacing windows and giving tenants web-based systems for managing their energy usage. It's part of an estimated $600 million renovation expected to take five years. More details to come.

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