eruptions. CO2 levels in outdoor air typically range from 300 to 400 ppm (% to %) but can be as high as 600-900 ppm in metropolitan areas. Although it is most commonly presentas a gas, CO2 can also exist in a solid (dry ice) form. How are FSIS employees exposed to carbon dioxide?
Jun 30, 2020· ppm. ppm. Nov. 15, 1959. ppm. n/a. Last CO2 Earth update: 3:35 on Nov. 16, 2019, Hawaii local time (UTC -10) This CO2 Earth table presents the most up-to-date, daily average reading for atmospheric CO2 on the planet. Units = parts per million (ppm). Measurement location = Mauna Loa Observatory, Hawaii.