Examines the nature and cost of steelmakers' antipollution measures. The industrywide expenditure of $39.4 million to control gaseous emissions and $54.7 million on water treatment in 1967 was an increase of 4.5 percent and 191 percent, respectively, over 1966. In 1968 the totals jumped to $102 million for air and $120 million for water cleaning, exceeding 1967 expenditures by 159 percent and 118 percent. Air pollution control apparatus in some modern plants account for more than 6 percent of total equipment costs, and water treatment facilities for over 10 percent. Modernization also implies pollution control through more efficient and economical use of resources. Air cleaning measures tend to increase water treatment expenses, and vice versa. Labor is the greatest cost in water waste management but is a minor cost factor in air purification. In most cases, removing the final 5 percent of pollutants costs as much or more than removing the first 95 percent.
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