The Laboratory of Operations Research in the context of the research program «COOPERATION 2011» and the project entitled «GHGs scenarios and mitigation opportunities in Energy, Transport and Industrial Sector in Greece till 2030» with the code number 11SYN-8-118 organized the 1st (26-27 March 2014) and the 2nd (31 October - 1 November 2014) Panhellenic Conference on "Environmental and Natural Resources Economics: Climate Change", 26-27 March 2014 at the lecture halls in the Department of Economics at the University of Thessaly (G. Kartali 72). Continuing this effort it organized successfully the 3rd (30 - 31 October 2015) and is planning to organize the 4th (4 - 5 November 2016) PanHellenic Conference in Economics of Natural Resources and Environmental Economics at the lecture halls in the Department of Economics at the University of Thessaly (G. Kartali 72).