10,000 ppm (1%) for several hours to eliminate pests such as whiteflies, spider mites, and others.In medicine, up to 5% carbon dioxide is added to pure oxygen for stimulation of breathing after apnea and to stabilize the O2/CO2 balance in blood.A common type of industrial gas laser, the carbon dioxide laser, uses carbon dioxide as a medium.Carbon dioxide can also be combined with limonene from or