The row over the working of the European Union's emissions trading scheme intensified last night when EDF Energy warned that speculators risked turning carbon into a new category of sub-prime investment.
Vincent de Rivaz, the chief executive of the UK arm of the French-owned gas and electricity group, said politicians and regulators needed to revisit the way the ETS was working and whether it was bringing the results they wanted. "We like certainty about a carbon price," he said. "[But] the carbon price has to become simple and not become a new type of sub-prime tool which will be diverted from what is its initial purpose: to encourage real investment in real low-carbon technology."
Green campaigners have long been critical of the way the emissions trading scheme was set up, but it is unusual for a leading industry figure to cast doubt on it, as power companies lobbied hard for a market mechanism to deal with global warming.