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NANTES has long been proud of its green credentials but being named European Green Capital for 2013 will give it an eco standing on the world stage. The accolade is thoroughly deserved.
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http://www.tripideas.co.uk/posts/view/7025/Nantes-Fresh-accolade-for-green-lung-the-Loire
Has trams and bike schemes and art
http://int.rendezvousenfrance.com/en/discover/nantes-0
and docks - so perhaps look at an area starting at the Top of Leith Walk...