Superior Court of California, County of El Dorado. To preserve and enhance the rule of law in El Dorado County by providing all persons a fair, efficient, and accessible forum for resolving disputes, protecting public safety, and righting wrongs.
The Earthâs atmosphere is 78 percent nitrogen, 21 percent oxygen and 1 percent other gases, including about 0.04 percent carbon dioxide.And yes, Earthâs CO2 concentration stood at 400 parts per million in May 2015.Earthâs CO2 levels have been increasing in recent decades due to human activities and also natural factors, and some estimates say as little as 3 or 4 percent of carbon dioxide in the atmosphere is due to humans.nd yes, Earthâs CO2 concentration stood at 400 parts per million in May 2015. Earthâs CO2 levels have been increasing in recent decades due to human activities and also natural factors, and some estimates say as little as 3 or 4 percent of carbon dioxide in the atmosphere is due to humans.
Therefore, 10,000 ppm of a gas in air is a 1% concentration. At 1% concentration of carbon dioxide CO2 (10,000 ppm) and under continuous exposure at that level, such as in an auditorium filled with occupants and poor fresh air ventilation, some occupants are likely to feel drowsy.oxic levels of carbon dioxide: According to occupational exposure and controlled atmosphere research into CO2 toxicology, CO2 is hazardous via direct toxicity at levels above 5%, concentrations not encountered in nature [except perhaps at or near an active volcano or at water-logged soils].