Show I t L r V 1 J j I r w ra 4 lv rI d r er w S ifS 4 t I I S PONDERS PLANT POLLUTION Dr A A. A Clyde Hill examines ozone da damage mage to plants in specially built air pollution chamber wl which ch controls environment University of ot Utah research I scientist A. A Clyde Hillis Hill is studying studying study study- I ing the effects of air pollution on plant growth HE BELIEVES that about half of ot the pollutants in the Salt Lake Valley come from automobile exhausts while the other half halt comes from hydrocarbons and oxides released by industrial plants Working under a I IIi Ii year five ve- ve year grant ant from the P Public c I Health Service Dr Hill has de de- de signed an environmental chamber chamber chamber cham cham- ber where plants can be grown under controlled temperature humidity wind velocity and light Intensity IN ill HIS CHAMB CHAMBER ER experiments experiments experiments ments Dr Hill records plant damage and growth suppression suppression suppression sion caused by concentrations 1 of ozone i Dr Hill HUI is one o of four University University Uni Uni- o of Utah botany professors professors I sors studying pollution under grants totaling nearly I annually i j |