Penn Station Billboard Monitors Greenhouse Gases

Digital numbers help viewers track the amount of greenhouse gases in Earth's atmosphere

Thursday, Jun 18, 2009  |  Updated 5:45 PM EDT
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Penn Station Billboard Monitors Greenhouse Gases

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New Yorkers have long been able to keep tabs on the national debt, but they now have a highly visible counter to track greenhouse gas emissions.

A 70-foot-high billboard outside Madison Square Garden and Pennsylvania Station, not far from the Empire State Building, features a carbon counter. Digital numbers help viewers track the amount of greenhouse gases in Earth's atmosphere. As of Thursday
morning, it stood at more than 3.6 trillion metric tons.

The sign uses low-energy lights, offset by carbon credits.

The carbon counter is sponsored by Deutsche Bank. It is a few blocks from the National Debt Clock, which keeps track of the U.S. government's debt.

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