'Green' energy companies in Mass.

Conservation Services Group Location: Westborough Sector: Energy-efficiency Founded: 1984 What it does: A nonprofit organization that runs energy-efficiency programs, it serves clients including National Grid, San Diego Gas & Electric, and the Energy Trust of Oregon. Its goal is to develop energy efficiency for energy program administrators, builders and contractors, and residential and commercial groups.
Dina Rudick / Globe Staff / File 2008

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Conservation Services Group

Location: Westborough
Sector: Energy-efficiency
Founded: 1984

What it does: A nonprofit organization that runs energy-efficiency programs, it serves clients including National Grid, San Diego Gas & Electric, and the Energy Trust of Oregon. Its goal is to develop energy efficiency for energy program administrators, builders and contractors, and residential and commercial groups.