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    Nova
    Planet EarthPlanet Earth

    Mexico Considers Gum Tax

    Discarded chewing gum is a common eyesore, and removing it from city streets and sidewalks can be costly. A Mexican congressman wants to solve the problem by borrowing a concept widely used in environmental regulation: making the polluters pay.

    ByAri DanielNOVA

    National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.