Is Progress in Energy and Combustion Science q1 or q2? - (PECS) Progress in Energy and Combustion Science (PECS) publishes review articles on all aspects of energy and combustion science, providing a comprehensive in-depth overview, evaluation, and discussion of a particular topic. Climate change and conservation of energy requires an efficient combustion of fossil fuels and as importantly, emerging sustainable energy systems beyond combustion. The protection of the environment demands a limitation of the pollutants, including greenhouse gases, emitted from combustion and other energy-intensive systems. Combustion also plays an important role in process technology and materials science. more...