Business Green: The ambitious Masdar City project has secured arguably its highest profile backer to date, after the US government signed a deal with the Abu Dhabi state-owned company behind plans to build one of the world’s premier clean tech hubs. Masdar was set up by the Abu Dhabi government in 2006 to advance the development, commercialisation and deployment of renewable energy and clean technologies. The company has since secured a raft of high profile corporate partners and investors, keen to …