Nay Pyi Taw, 22 Jan— Pyithu Hluttaw (Lower House) session raised questions on retirees who worked beyond their retirement age, environmental and social impacts from factory sewage of an industrial zone in Mawlamyine and upgrading a stadium in Myaung on Thursday. Deputy Minister for Finance Dr Lin Aung answered the questions on retirees, saying that government employees are required to retire when they are sixty under section 230 of rules for government employees, and it is true that the Ministry of Education asked retirees who worked beyond their retirement age to repay the salaries and benefits they enjoyed beyond their retirement age. The deputy minister added that some staff of the education ministry, however, were found to have dishonestly changed their dates of birth so that they could work beyond their retirement age and as a result, the ministry took necessary measures to recover the salaries and benefits in accordance with the law. Deputy Minister for Environmental Conservation and Forestry Daw Thet Thet Zin responded to the question on sewage from factories in Mawlamyine, saying that only nine out of 117 factories under operation use water and the waste water from the factories is treated before it is drained out into nearby paddy field. The waste water is not drained out into the Attaran River, which is about 1,800 feet away from the industrial zone, according to the deputy minister. As paddy in the field is growing well, there is no impact of waste water on the environment, she added. For the upgrading of the stadium in Myaung, Deputy Minister for Sports U Thaung Htaik said that the government allotted K 100 million in 2014-15 fiscal year and upgrading tasks are being carried out at the moment.