information abouc direct requirements. Once the usefulness of environ-
mental multipliers is clear to planners, there will be impcfus for better
data collection in this area.
 Pollution may be viewed as an output by joint product of the produc-
tion process. In light of current air and water pollution control laws,
it is important to consider how much pollution will increase due to eco-
nomic expansion, Again, multipliers based on inputmoutput analysis can
provide this type of information. Data problems (since agnin only national
data is available for only some sectors) and problems due to assumptions
of constant coefficients for pollution are the same as those discussed
above for resource use. (See Appendix A for data sources.) The multi.
pliers are calculated based on coefficients for direct physical quantity
of waste products per dollar of output and the interdepend.ence coefficients,
Once the physical quantities of waste are calculated, these may be con-
verted into actual air and water pollution levels depending. on local
weather and stream flow conditions.
 Table 6 presents various types of air and water pollution multipliers
per unit increase in final demand. The interpretation of these multipliers
is similar to the resource use multipliers above, Again, in cases where
direct data is missing in Table B4, the table shows only indirect effects
and comparisons must be limited to those sectors with direct pollution
data.


 USE OF THE IlULTIPLIERS FOR IMPACT ANALYSTS AND PLANNT.NG


 Good planning relating to growth and development requires that proposed
plans be compared on the basis of potential impacts on the conununity, The
types of impacts to be considered are defined by corumlnity: goals, If com-
munity goals involve raising income and employment levels, then impacts in
these areas need to be compared for alternative plans to see which plan
best meets the needs. On the other hand, if some community goals can po"
tentially be affected by development, such as in the areas of environmental
goals and goals relating to public facilities and expenditures, the impacts
of these areas also need to be considered. In general, impacts need to be
considered in the general areas of economic, social, and environmental