Abstract The most important aspect of the national environmental policy concerns air pollutant emission decrease. The studies led in order to identify the atmospheric pollution sources have revealed that the energy sector is one of the biggest pollutants in the economy. Given the negative impact of the pollutant emissions on the environment and the possibility of closing the large combustion plants in case necessary measures to comply with the legal regulations in the field are not taken will significantly reduce the amount of air pollutants from these installations. This paper presents a case study regarding the monitoring of emissions from the large combustion plants on the platform of S.C. CET S.A. in Bacau. Key words: combustion plant, emission limit value, fuel, monitoring, reduction Received: March, 2014; Revised final: July, 2014; Accepted: July, 2014 Author to whom all correspondence should be addressed: e-mail: mirelap@ub.ro, telephone:+40723291670 1. Introduction Energy saving together with the decrease of the greenhouse gas emissions and global warming attenuation have become problems with major technological, social and political impacts (Friedler, 2010). Since 1970, energy efficiency and conservation have become key components of energy security approach. They were also considered effective ways to cut down the emissions of greenhouse gases from burning of fossil fuels (Neelis et al., 2007). Electricity production in the world is expected to exceed over the next 25 years, mainly due to the demand of emerging economies. In this context, the charcoal will likely remain one of the most important energy sources, which will entail significant amounts of pollutant emissions unless measures to reduce them are being taken (Yeh and Rubin, 2007). Researches in the Chinese energy sector have shown that the use of ecological processes together with the emission of control technologies could lead to the decrease of SO