Lime and the air we breathe
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Hol3"^bul breath for even just half £ minute and you'll realize how precious air is to every living thing. But there are f of course, different qualities of air . . . from clean and healthful to polluted and harmful. Lime is doing a lot to help eliminate the latter kind. Smoke stack emissions — unless effectively treated — commonly contain large amounts of sulfur dioxide or SO2. Combining with iwisture in the air, it becomes sulfuric acid! Which can eat
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holes in steel, to say nothing of what even slight concentrations can do to lungs. With lime as their active agent, stack-gas scrubbers remove up to 90% of the SO2 . . . which combines with the lime and converts it to inert and sometimes useful gypsum. Many remarkable advances in the design and operation of such scrubbers have been achieved in recent times. Care to know about them, or other advantageous uses of lime? Write our Department B-1.
NATIONAL LIME ASSOCIATION 5010 W I S C O N S I N A V E N U E , N.W. W A S H I N G T O N , D.C. 2 0 0 1 6
