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Water quality tests have been conducted on the southern artificial lake of the Beijing National Stadium, the main venue for the 2008 Olympic Games.

Plants have also been grown beneath the water surface, aiming to purify the water.

The National Stadium, also known as the bird's nest because of its unique design, is the main track and field stadium for the Olympics and will host the opening and closing ceremonies.

(chinanews.cn June 8, 2007)