Johnson Controls' green building and efficiency solutions are in play at 18 Olympic stadiums and supporting facilities, the firm said.

The sites include the vast National Stadium, also called the Bird's Nest, the National Gymnasium, which is better known as Turtle Back, the Beijing Olympic Building, Beijing University Stadium, Laoshan Mountain Bike Course, Qingdao Olympic Sailing Center, China International Conference Center, Tianjin Olympic Building, New CCTV Building and the Beijing Capital International Airport T3.

Making the international gathering a green event is one of the banner themes for the games and has been the platform for a major campaign by China to showcase its efforts in environmental responsibility.