CO2 is an odorless, colorless gas that is naturally present in the Earth's atmosphere. It is a major component of air pollution and is a greenhouse gas that contributes to global warming. It is also a byproduct of the burning of fossil fuels and other activities.
Toxicity Levels
The United States Environmental Protection Agency (EPA) has classified CO2 as a hazardous air pollutant. According to the EPA, the toxic level of CO2 is greater than 1,000 parts per million (ppm), and exposure to levels higher than this can result in a variety of health effects. Short-term exposure to levels higher than 1,000 ppm can cause headaches, dizziness, fatigue, and nausea. Long-term exposure to levels higher than 1,000 ppm can cause respiratory and cardiovascular problems, as well as damage to the central nervous system.
Indoor Air Quality
CO2 levels in indoor air can be much higher than in outdoor air. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has established a guideline of maintaining CO2 levels in indoor air at or below 1,000 ppm. The EPA recommends that CO2 levels in indoor air should not exceed 800 ppm for extended periods of time.
CO2 Monitors
CO2 monitors are devices that measure the levels of CO2 in the air. They are used in homes, offices, and other buildings to make sure that the CO2 levels are within a safe range. Some monitors also measure other air pollutants, such as volatile organic compounds (VOCs) and particulate matter (PM).
