The compiler of the mainland's first 'Green GDP' report said the lack of provincial support had compromised its data's integrity, underlining a major challenge facing China's attempts to clean up its environment. The working group for the pilot 'Green GDP' audit research report also said the withdrawal of provincial and local governments from taking part in its research had made its work difficult. According to the Beijing News, on Saturday the group won a special prize at the 'People of the Green China Year 2006' awards for finding that pollution had cost the mainland 3.05 per cent of its gross domestic product, or 511.8 billion yuan. This finding was announced in September at the end of a study by the State Environmental Pollution Administration (Sepa) and the National Bureau of Statistics. Hosted by the National People's Congress, the Propaganda Department of the Communist Party's Central Committee and other government bodies since last year, the awards are given to individuals or entities that have made significant contributions to environmental work on the mainland. 'We are receiving this award with a rather heavy heart, because up till now 'Green GDP' has still not garnered consensus from the various local governments,' an unidentified spokesman said. 'Just in the past two days, some of the provincial governments had pulled out from [our work].' Other members of the group, such as deputy director of Sepa, Pan Yue , were adamant that their 'Green GDP' audit report could still be completed despite the lack of provincial support. 'Even if there is only one province left, we are still going to complete the audit [for 2005],' he said. China - which is both the world's second biggest consumer of energy and emitter of greenhouse gases - is aiming to cut energy consumption per unit of GDP by 20 per cent by 2010, and air pollution emissions by 10 per cent over the next five years. But with economic growth expected at below 10 per cent next year, even Premier Wen Jiabao has warned that this could thwart efforts to cut pollution. Officials' collusion with business stakeholders is also diluting the government's effort to achieve its green goal. Ma Kai , director of the National Development and Reform Commission, told a reform conference on Saturday that the green goal was challenged by the fact that the secondary industry, which consumes more power and was therefore more polluting, was still growing faster than the tertiary sector.