Three local community groups believes there is an obvious conflict of interest.
Laois County Council is rejecting claims that a recent report into the carbon footprint of Portlaoise was biased.
German company Siemens - which manufactures wind turbines - was commissioned to carry out the study - something three local community groups say creates an obvious conflict of interest.
People Over Wind (Cullenagh); Ratheniska, Timahoe, Spink Substation Action Group; and Concerned Residents of Spink wrote to all Laois county councillors to raise their concerns last month.
However, the local authority's director of services says Siemens was chosen as the most economical option after a publicly-advertised tender process.
Donal Brennan says the purpose of the report was establish the town's carbon emissions, not provide any direct recommendations: