Citation

Azuma K, Kagi N, Yanagi U, Osawa H. Environ. Int. 2018; 121(Pt 1): 51-56.

Affiliation

Department of Environmental Health, National Institute of Public Health, Wako 351-0197, Japan. Electronic address: osawa@niph.go.jp.

Copyright

(Copyright © 2018, Elsevier Publishing)

DOI

10.1016/j.envint.2018.08.059

PMID

30172928

Abstract

Scientific literature and documents pertaining to the effects of inhalation exposure to carbon dioxide (CO₂) on human health and psychomotor performance were reviewed. Linear physiological changes in circulatory, cardiovascular, and autonomic systems on exposure to CO₂ at concentrations ranging from 500 to 5000 ppm were evident. Human experimental studies have suggested that short-term CO₂ exposure beginning at 1000 ppm affects cognitive performances including decision making and problem resolution. Changes in autonomic systems due to low-level exposure to CO₂ may involve these effects. Further research on the long-term effects of low-level CO₂ exposure on the autonomic system is required. Numerous epidemiological studies indicate an association between low-level exposure to CO₂ beginning at 700 ppm and building-related symptoms. Respiratory symptoms have been indicated in children exposed to indoor CO₂ concentrations higher than 1000 ppm. However, other indoor comorbid pollutants are possibly involved in such effects. In the context of significant linear increase of globally ambient CO₂ concentration caused by anthropogenic activities and sources, reducing indoor CO₂ levels by ventilation with ambient air represents an increase in energy consumption in an air-conditioned building. For the efficient energy control of CO₂ intruding a building from ambient air, the rise of atmospheric CO₂ concentration needs to be urgently suppressed.

Copyright © 2018 Elsevier Ltd. All rights reserved.

Language: en

Keywords

Carbon dioxide; Indoor air; Low-level exposure; Physiological change; Psychomotor performance