• Case study

    Philadelphia Sustainability Plan—Greenworks

    January 10, 2013 Philadelphia

    In Mayor Michael Nutter's January 2008 inaugural address, he pledged to make Philadelphia the number one green city in America. To make good on his pledge, he created the Mayor's Office of Sustainability early in his first term as mayor. The Mayor's Office of Sustainability spent a year researching municipal sustainability, talking with residents, and drafting Greenworks Philadelphia, the City's comprehensive sustainability plan. Greenworks was released in 2009 and is in its fourth year of implementation.

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  • Case study

    In 2011, the City of Philadelphia installed a 250 KW solar array at the Water Department's Southeast Water Pollution Control Plant. The system generates 300,000 KWh annually, or enough to power 28 homes. This energy savings from this installation will prevent approximately 220 metric tons of carbon dioxide from being emitted annually.

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  • Case study

    PWD Biogas Cogeneration Facility

    December 16, 2012 Philadelphia

    In 2012, the Philadelphia Water Department (PWD) and the company Ameresco, Inc. announced an agreement to develop and maintain a cogeneration facility at PWD's Northeast Water Pollution Control Plant. This project will use digesters to generate 5.6 MW of thermal energy and electricity from biogas, which occurs as a byproduct of the plant's wastewater treatment.

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  • Case study

    BigBelly Trash Compactors

    December 16, 2012 Philadelphia

    In 2009, Philadelphia replaced 700 public wire trash baskets with 500 BigBelly-brand solar trash compactors. These bins lower the number of trips needed to collect public waste by using solar energy to compact waste while it is in the bin. This allowed the City to save money from reduced collection costs and fuel use.

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  • Case study

    Prove: Cooking Oil Reuse

    December 16, 2012 Rio de Janeiro

    The Reuse of Vegetable Oils in the State of Rio de Janeiro Program, or Prove (for the Portuguese-language acronym), was created in 2008 by the Secretary of State for the Environment (SEA) in order to stimulate the collection of used cooking oil and its reuse in the production of soap and alternative sources of energy such as biodiesel.

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