California

Greenpeace Erfurt c/o CZE - Erfurt

Nelson Enviro LLC - Atwater, California

Enviro-design - Mariposa, California

Summit Technology Group - Santa Rosa, California

CalTech Environmental Construction - Rocklin, California

Green Century Institute - San Francisco, California

EVN Lichttechnik GmbH - Winkelhaid

BUNDconnect GmbH - Lauf an der Pegnitz

Lebensader Bahn 2.0 - Nuremberg

Energieberatung Nordbayern - Nuremberg