​Carbon dioxide (CO₂) is a colorless and odorless gas, which is present in the air we breath, in very low concentrations. Classified as a ‘substance hazardous to health’ by the Health & Safety Organizations, higher concentrations of carbon dioxide becomes harmful to health and has proved to be fatal in many circumstances. One of the biggest dangers of carbon dioxide is the fact that it is a ‘silent killer’ as it simply cannot be detected by human senses alone, even at the highest of concentrations.

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