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High humidity has a marginal effect on plants.
Poole, R.T. and C.A. Conover. Response of foliage plants to commercial interior paints. Poole, R.T., C.A. Conover and Y. Ozeri. Response of African violets to fertilizer source and rate. Poole, R.T., C.A. Conover and K.G. Steinkamp.