Lorenzo-Sáez, Edgar; Coll-Aliaga, Eloína; Oliver Villanueva, José Vicente; Prieto del Campo, Fernando; LERMA ARCE, VICTORIA(MDPI AG, 2022-05)
[EN] During the period of the COVID-19 pandemic, the air quality reached the best levels to be recorded in large cities in Spain. To analyze and demonstrate this improvement in air quality levels, the evolution of the ...