Preliminary analysis is attempted to examine environmental independence between urbanization and lifestyle using input-output model.Here the model is based on Japan Input-Output Tables for 1970, 1980 and 1990 at a higher lebel of aggregation. Preliminary results are shown as follows: a) yearly carbon dioxide emission patterns due to consumers'expenditure are explained as multiplication of slightly decreasin emission intensities and increasing household expenditures; b) both effecting and responsing coefficients are calculated with consideration of carbon dioxide inducement, and this shows yearly reflection of lifestyle on the industrial structure.