Messen & Kongresse:

biogas - expo & congress
http://www.biogas-offenburg.de/

ECOMOBIL - expo & congress
http://www.ecomobil-offenburg.de/

GeoTHERM - expo & congress
http://www.geotherm-offenburg.de/

Windenergie - expo & congress
http://www.windenergie-offenburg.de/