ROMEO was a large measurement campaign aimed at investigating methane emissions from oil and gas production in Romania. The campaign was initiated by the European H2020 project MEMO2 and was funded through the Climate and Clean Air Coalition (CCAC) international methane science studies, administered by the United Nations Environment Program (UNEP). During the campaign, 14 research teams from the Netherlands, UK, Denmark, Germany, Romania, US, Switzerland, Poland, and Sweden were deployed in the field to measure CH₄ and other atmospheric parameters using instruments placed on two aircraft (from Scientific Aviation and INCAS), as well as on drones and mobile platforms.
The project ran from 2015 to 2020.