This invention generally relates to a method and apparatus for determining carbon emission reduction credits and, more particularly, to a method and apparatus for generating and quantifying standardized carbon emission reduction credits. General data and site-specific data, if available, are input into a carbon sequestration model to determine the approximate change in the level of carbon compounds stored in a media, such as soil, over a specified period of time. An uncertainty analysis is conducted on the results to quantify and normalize carbon emission reduction credits. Standardized carbon emission reduction credits may be compiled for trade and other carbon emission reduction credits are placed in reserve.