Abstract
At the request of the Journal Editor and SAGE Publishing, and with the agreement of the author, the following article has been retracted.
Holmes, R. I. Reducing ventilation air methane emissions cost-effectively and safely. Energy and Environment 2016; 27(5): 566–585.
Recently, it was brought to the attention of SAGE and the Editors that a version of this paper had been previously published in another journal:
Holmes, R. I. Mitigating Ventilation Air Methane Cost-Effectively from a Colliery in Australia. Journal of Applied Engineering Sciences 2016; 6(1): 41–50.
In line with COPE guidance, SAGE and the Editors investigated the similarity of the articles and the author confirmed that, as a PhD student and not being fully aware of publishing ethics practices, he had simultaneously submitted similar versions of the manuscript to both journals. The author apologises for this error. For reasons of redundant publication, this paper has been retracted.