Man on bike behind bus in Hong Kong
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Persuading Hong Kong to take up cycling

9 October 2012 Last updated at 16:56 BST

Hong Kong is considered to be one of Asia's most polluted cities, and one where four wheels rule.

Now, cycling enthusiasts such as Will Soo and Martin Turner, are trying to encourage more people to get on their bikes and do their bit for the environment.

The BBC's Juliana Liu reports.