The OECD INTERLINK model was used to assess the macroeconomic impacts of a European Community directive to control air pollution. For this purpose the model was adapted. To meet the directive the EC would have to invest some 15 billion ECU. The annual costs would be 3.4 billion ECU in 1993. The simulation results suggest that the macroeconomic impacts are small and are positive during the investment period and more negative in the subsequent period. Differences in results among EC countries are expected. These not only are due to differences in pollution control costs but also result from indirect impacts of coordination.