ການພະຍາກອນຄຸນນະພາບອາກາດ
ຂໍ້ມູນຄຸນນະພາບອາກາດສະໜອງໃຫ້ໂດຍ: the Calidad del Aire en Navarra (navarra.es) and the European Environment Agency (eea.europa.eu)
Note that the measurements for SO2 (sulfur dioxide) and CO (carbon monoxide) are taken from the station: Tudela, Navarra