Who is NOT mentioned as participants of this "Earth Hour" activity?

Sydney was not completely blacked out Saturday evening, but organizers of "Earth Hour" say they are delighted with the response. Lights on the city’s iconic Harbor Bridge were switched off for the hour along with most of those on the famous Sydney Opera House.(27)Tens of thousands of suburban homes joined in. So did hundreds of business. Many tower blocks have spent the evening in almost total darkness.(28)The event has had high-profile support to raise awareness about how to combat global warming.