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  2. Perna viridis - Wikipedia

    en.wikipedia.org/wiki/Perna_viridis

    Perna viridis, known as the Asian green mussel, is an economically important mussel, a bivalve belonging to the family Mytilidae, or the "true mussels". It is harvested for food but is also known to harbor toxins [ citation needed ] and cause damage to submerged structures such as drainage pipes.

  3. How to snake a drain, according to a plumber - AOL

    www.aol.com/news/snake-drain-according-plumber...

    A drain snake can potentially damage pipes if they’re used improperly. Be sure to follow the manufacturer’s directions carefully before using and/or talk to a plumbing expert if you’re unsure.

  4. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

  5. Utility location - Wikipedia

    en.wikipedia.org/wiki/Utility_location

    In recent years, DIRT has demonstrated a trend of greater excavation damage incidents over time. [8] This report does not contain every single incident, as stakeholders voluntarily submit underground damages and near-miss reports, but it is the most complete repository of utility damages anywhere in the world.

  6. Sewer gas - Wikipedia

    en.wikipedia.org/wiki/Sewer_gas

    An old sewer gas chimney in Stonehouse, Plymouth, England, built in the 1880s to disperse sewer gas above residents. Sewer gas is a complex, generally obnoxious smelling mixture of toxic and nontoxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes, typical components of sewage.

  7. Truth in Advertising: What Does 'Green' Really Mean? - AOL

    www.aol.com/news/2010-11-28-dangers-of-green...

    The 2010 TerraChoice study found 73% more "green" products in U.S. and Canadian markets, compared to last year. Dr. Hutton also points to studies of how people chose between various products and ...