The smog eater is a creature produced artificially in the laboratory. The smog eater is placed in large urban areas where pollution reaches the highest levels. The smog eater is blind and never leaves his support, it has an average life of 2 years who spends motionless, filtering contaminated air and giving back pure oxygen.
It is estimated that in 2076 in the center of New York city, a colony of 600 smog eaters have contributed to 56% of the restoration of the default values of oxygen in the atmosphere.