Researchers call them the "American blondes" -– bright-eyed environmentalists tweeting passionately in support of the UAE and its handling of the forthcoming COP28 climate summit.When Romain Ioualalen, a campaigner from Oil Change International, tweeted about the risk that COP28 hosted by the Emirates "slows down the transition away from fossil fuels", he received several responses from some of the accounts identified as fakes by researchers.