…The protest group, called Greenwash Gold 2012, will invite members of the public to vote online for the “worst corporate sponsor” [of the London Olympics] after watching three animated films it has made about the environmental record of…these companies…The films feature a survivor of the Bhopal gas tragedy; a representative of the communities in the Gulf Coast, scene of BP's oil spill in April 2010; and a campaigner from Utah who says she is fighting “life-threatening” air pollution levels caused by one of the mines from which Rio Tinto is providing the metal for the Olympic medals…Dow, which bought the Bhopal plant from Union Carbide after the gas tragedy, denies any liability. The Games' organisers have defended the decision to award the contract to Dow, saying it was taken after all the issues were “very carefully” considered. BP said it remained “100 per cent committed” to making the Games a success while a Rio Tinto spokesman said its operations were “consistently in compliance with U.S. Environmental Protection Agency and Utah Division of Air Quality regulations.”