Abstract: Displayed content of signage at a distal location is at least partially controlled by a processor and database that directs signage display from a distal location. A central location processing system collects information on local, area wide, national or international conditions, events or changes in status and directs local signage to display appropriate information. The central location itself collects information, samples information, and evaluates general information to determine what specific information may be appropriately or desirably displayed at local signage. The display may be relevant to seasonal events such as holidays, sports events, actual changes in season, school year beginnings or endings, political events and the like, or independent events or conditions such as weather changes, severe weather, sales events, consumer alerts, public alerts, special event days. Information displayed locally can consider evaluation of local response to a range of potentially displayed information.

Abstract: Gases are vented from a waste site such as a landfill, and the gases are separated into at least three streams comprising a hydrocarbon stream, a carbon dioxide stream, and residue stream. At least a portion of the carbon dioxide stream and hydrocarbon stream are liquefied or converted to a supercritical liquid. At least some of the carbon dioxide gas stream (as a liquid or supercritical fluid) is used in a cleaning step, preferably a polymer cleaning step, and more preferably a polymer cleaning step in a polymer recycling process, and most preferably in a polymer cleaning step in a polymer recycling system where the cleaning is performed on-site at the waste site.