Assessment of tropospheric nitrogen dioxide (NO2) levels on the COVID-19 pandemic in MoroccoMohammed Mourjane, Naoual El Hammouch, Farah El Hassani, Fatima El Hammichi, Mohammed Benabdelhadi and Hassan TabyaouiBIO Web Conf., 115 (2024) 01004DOI: https://doi.org/10.1051/bioconf/202411501004