The present invention relates to an information processing apparatus capable of easily executing calculation of an environmental load volume (LCA result 23). Inventory data 21 which is data of individual materials and components is used as a basic data of a aggregate data 22 when calculating the environmental load volume. The aggregate data 22 is comprised by referring to a plurality of inventory data 21. When information per product is inputted, on the basis of this information, its aggregate data is calculated and used for calculation of LCA result 23. Further, the LCA result 23 is calculated also using other LCA results 23 already calculated. The present invention can be applied to a computer for calculating the environmental load volume. <IMAGE>
