CHICAGO, Sept. 03, 2008 -- The Boeing Company [NYSE: BA], the world's leading aerospace company and the largest manufacturer of commercial jetliners and military aircraft combined, is joining the World Environment Center (WEC), a global non-profit organization that helps companies around the world implement environmentally sustainable business strategies and operations. Headquartered in Chicago, Boeing employs more than 160,000 people across the United States and in 70 countries.