Air filtration systems consisting of air filtering units with foamed glass media, recycled glass media, carbon pellet media, carbon media, seashell media, peat nodule media, coconut coir media, or other treatment media, and air filtering units; air purification systems consisting of air filtering units with foamed glass media, recycled glass media, carbon pellet media, carbon media, seashell media, peat nodule media, coconut coir media, or other treatment media, and air filtering units; bio f...