Volver a Blog Haritz Arriaga Sasieta May 14, 2022 Dr. Arriaga obtained his PhD in 2010 at the Autonomous University of Barcelona (UAB). His expertise area is the assessment of greenhouse gases (N2O, CH4 and CO2) and ammonia (NH3) from the agricultural and livestock sector.Throughout his scientific career, Dr Arriaga has developed skills in measuring and assesing gaseous emissions at different stages of agricultural and livestock production systems.