The Olympic Park
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London 2012 will be the greenest Olympic Games to date

6 August 2012 Last updated at 10:33 BST

With hundreds of thousands of people streaming into Olympic venues, it was always inevitable that an awful lot of rubbish would be created.

However, the organisers of London 2012 have promised these Games will be the most environmentally friendly ever.

The BBC's Katya Adler reports.