Uncovering Hidden Greenhouse Gas Emissions in Wastewater Treatment with Drone-Based Monitoring Executive Summary This study presents the first multi-plant, full-scale assessment of methane (CH₄) and nitrous oxide (N₂O) emissions from 13 Swedish wastewater treatment plants (WWTPs) using advanced... Drone-Based Monitoring Greenhouse Gas Emissions In Situ Measurements Methane (CH₄) Nitrous Oxide (N₂O) Wastewater Treatment Nov 20, 2025