Mario A. Rosato is an electrical, electronic, and environmental engineer, as well as a scientific journalist. He built his first home-sized digester in Argentina when he was aged 16. The son of a university professor and researcher, he learnt to employ sophisticated instruments in his favorite playground: his father's lab. At the age of 25 he obtained a scholarship to specialize in renewable energies in Italy. At 28 he chose to leave the academic research world and devoted himself to the development of industrial solutions. In 1990 he settled in Italy and in 2000 he moved to Spain. In 2004 he became partner and scientific director of Bioenergia Aragonesa SL. In 2006 he patented the AFADS system, a multitrophic bioreactor for wastewater treatment. In 2009 he founded Sustainable Technologies SL in Barcelona. From 2010 he expanded his company's activity to Italy, where he became professor at several private professional institutes. Since then he has trained more than 100 biogas plant managers in Italy and Spain. He installed a laboratory for applied research and routine anaerobic digestion tests in the Technologic Park of Pordenone in 2011. The same year he won The Economist's award for the best entrepreneurial idea to tackle global climate change, based on the production of biohydrogen and the cultivation of bamboo in a circular economy cycle. Some months later, he received the Green Vision Award from Modus Vivendi magazine in Rome. His industrial solutions, based on original applied research, place him 4th in the worldwide Top Solvers list on Innocentive.com. In 2012, during the research project H2Ocean, funded by the European Commission's 7th Framework Program, he develops a novel type of digester for marine biomass, specially conceived for offshore operation. In 2013 he won two international awards for the conceptual design of a domestic garbage digester, meant for low-income Indian families. Since 2014 he has been in charge of the column on bioenergy for agronotizie.it, a specialized e-zine for agronomists and farming professionals. In 2015 he was a member of the technical commission in charge of redacting the Italian norm on the biochemical methane potential (BMP) test protocol, and his contribution focused on the error propagation analysis and improving both accuracy and precision.