According to the number of papers in the field of thermal processes taking place in internal combustion engines, and submitted for publication in the journal Thermal Science, it seems that this field will become regular topic of our journal. Again, papers dealing with biofuels and emissions prevail, which is not unexpected, considering general interest for use of renewable energy sources in all energy sectors and end-use equipments in all sectors of industry and human life, and interest for global warming and control of the emission of the green-house gasses.