Energy supply and the preservation of the environment are some of the current concerns for society and for the scientific community. Research and development on carbons is aware of that as shown in this congress with the section “Carbons for Environmental Applications”. Starting from the fact that carbon is a unique element which can form several and very different nanostructures, the research in carbon materials is tremendously broad and covers numerous applications, most of them related with the environmental. Among them it can be highlighted the following topics that will be covered in this session of hot-topics: adsorption, catalysis and bio-carbons.