Show Scientists Have Major l Role Plant physiologists are arc against time to develop hardier trees shrubs and other plant life that will thrive in the polluted air of American cities and roadsides Because of the oxygen production tion and sound abatement capabilities ties of plant life plants have become important weapons in in the fight for a better environment according to the American Association tion lion of Nurserymen Massive plantings along freeways freeways freeways free free- ways actually can absorb amazingly amazingly amazingly large quantities of carbon carbo monoxide from automobile exhaust fumes and produce new oxygen in in its place They can also serve as sound barriers for adjoining adjoining adjoining adjoin adjoin- ing neighborhoods Hardier plants are arc also needed for inner city locations such as shopping malls and vest pocket parks among skyscraper office buildings or tenement houses Some landscape size trees and shrubs are actually being taught to live indoors and like it it |