Earth Hour 2011

Celebrity Earth Hour ambassadors included South African Archbishop Desmond Tutu, former New Zealand Prime Minister Helen Clark, President of Vietnam Nguyễn Minh Triết, and London Mayor Boris Johnson.
Earth Hour has garnered support from many corporations including Coca-Cola Enterprises, Wells Fargo, IKEA, HSBC, PwC, Accenture and Nokia Siemens Networks.
Some critics point out that the reduction in power consumption in most cases is indistinguishable from zero. Sydney's The Herald Sun equated the power savings in the Sydney central business district to "taking 48,613 cars off the road for 1 hour." Critics, most notably Australian Columnist Andrew Bolt pointed out that "A cut so tiny (48,613 cars off the road for 1 hour) is trivial - equal to taking six cars off the road for a year".