Ozone Damage: Protection for Plants

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Science  21 Jun 1963:
Vol. 140, Issue 3573, pp. 1317-1318
DOI: 10.1126/science.140.3573.1317


Tobacco plant leaves treated with dried particulate charcoal, diatomaceous earth, and powdered ferric oxide so that a covering formed on the leaves were relatively undamaged by comparison with untreated controls when exposed to as much as 0.9 part of ozone per million in the atmosphere. A theory is offered to explain the results.