Editorial - International Journal of Sustainable Energy Planning and Management Vol 28

This editorial introduces the 28^th volume of the International Journal of Sustainable Energy Planning and Management. This volume is probing into the actors engaged in energy renovation, rural district heating in Hungary, and hydropower expansion on the Indonesian island of Sulawesi. Other work address power-to-gas technology and some of the obstacles facing this technology, pine needles and hydropower as sources of renewable energy in Himalaya, how adaptive pricing can influence electricity demand and thus energy system performance, and finally community participation in renewable energy in Tanzania.