Because the urban CO 2 dome is a newly recognized phenomenon, there is much that remains to be learned about it. For example, our Fact Sheet is presently unable to broach the subject of how large it is in other cities, or whether or not it is a well-defined function of population. In addition, we do not know whether it is different for first and third world cities, nor is its vertical extent defined. As additional studies on the phenomenon make their way into the literature, we will update the contents of this Fact Sheet. References Allen, L.H. Jr. 1990.
Plant responses to rising carbon dioxide and potential interactions with air pollutants.
Changnon, S.A. 1992. Idso, C.D., Idso, S.B. and Balling, R.C., Jr. 1998. The urban CO 2 dome of Phoenix, Arizona. Idso, C.D., Idso, S.B., Idso, K.E., Brooks, T., and Balling, R.C. 1998. Spatial and temporal characteristics of the urban CO 2 dome over Phoenix, Arizona.