Massachusetts

 Cambridge Park Spark was a temporary installation at Pacific Dog Park in Cambridge that attracted widespread attention when it was initiated by Matthew Mazzotti in 2010.  This compelling project transformed dog waste into energy (methane) through a publicly fed methane digester that  fuelled a gaslight.

  Nantucket Nantucket accepts un-bagged pet waste as part of its community composting program (see Compostable Waste C at linked site.)