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.
One of those tests was to determine the percentage of O2 in the atmosphere. Too much is just as dangerous as too little. Gary Elmer is correct in stating that the O2 content at sea level is typically 20.9 percent. However, some chemical process can produce free oxygen, increasing the content.