that might result in an improved carbon dioxide environment. To understand the implications and extent of factors associated .with carbon dioxide enrichment in the field, factors of the carbon cycle are presented here In ancient times, when oil and coal fields were formed by the products of photosynthesis, levels of carbon dioxide in the atmosphere may have been 10 to 100 times that of today's levels (Plass 1959). The carbon locked in fossil fuels millions of years ago is now being released by combustion and may be contributing toan increasing carbon dioxide concentration in the atmosphere today