The head of Macau's sole power supplier has questioned the emissions trading scheme proposed by Hong Kong, saying trading in pollution will be a big mistake. Bernard Delaboudiniere, the chief executive officer of Companhia de Electricidade de Macau (CEM), also said polluters should clean up their own waste. He said there was no reason to invest in emissions trading unless it was financially viable. Last year, the central government endorsed a request from Hong Kong for a study into a pilot emissions trading scheme for Guangdong, Hong Kong and Macau. Last month, officials from the Ministry of Environment, Transport and Works completed their study trips to Beijing and Zhejiang province where such schemes have been introduced. The cross-border scheme was first raised last July by Hong Kong's environment minister, Sarah Liao Sau-tung, to address regional air pollution. The scheme aims to cap the emissions of power plants in the region through an incentive system that allows them to sell their unused emission quotas to other companies. In an interview with the South China Morning Post, Mr Delaboudiniere said no information had been received from Macau or Hong Kong authorities about the trial scheme. He said Macau had little to do with air pollution in the Pearl River Delta. He also blamed Hong Kong and Guangdong for exporting air pollution to Macau. 'From our point of view, it is better to [clean up pollution] by yourself. On this regard, Macau has been doing a lot.' The CEM chief said Macau's small geographical size argued against its participation in any regional pollution-trading programme. 'Macau is just 25 square kilometres in size, versus the 500,000 square kilometres of Guangdong. If we trade off pollution and pollution can be sold, it would be a big mistake to try to balance Guangdong and Macau on pollution,' he said. However, he pointed out that his company was open-minded towards any proposal, so long as the scheme was justifiable as a business. 'Yes, we can always consider participating. The question is, what is the business? Do we sell or buy pollution? What is the value for business? If it is of no value, there is no reason to invest,' he said. CEM, in which the Macau government has an 8 per cent stake, has two power plants in the former Portuguese enclave, one located near the airport in Coloane and the other near the city centre. Both are oil-fired plants and have a combined capacity of 350MW. A new gas-fired 135MW power plant has been in partial operation and is expected to be completed this year. It is estimated that the new plant would emit 20 times less pollutants than the oil-fired facility. Mr Delaboudiniere said the firm would consider scrapping part of the oil-fired facility after the second phase of the new plant was completed. Macau imports electricity from Zhuhai whenever there is a supply shortage during peak season. A second interconnection network, to be linked to Hengqin in Zhuhai, is under construction.