TY - CPAPER AU - Vasilica Vasle AU - Cristian Petcu AU - Alina Mihaela Dima AU - Mihaela Ion TI - LOCKDOWN IMPACT ON AMBIENT AIR QUALITY IN THE CONTEXT OF COVID-19 PANDEMIC T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Energy and Clean Technologies PY - 2021 SP - 303 EP - 310 DO - 10.5593/sgem2021/4.1/s19.51 PB - STEF92 Technology ER -