Prolonged exposure to UV-B light can cause sunburn, and there are worries that damage to the ozone layer may lead to an increase in the incidence of skin cancer.
The ozone protects the skin from sunburn and helps plants retain water.
( z1 and :op ( z2 protect :ARG0 ( z3 ozone ) :ARG1 ( z4 skin ) :ARG2 ( z5 burn :ARG0 ( z6 sun ) ) ) :op ( z7 help :ARG0 z3 :ARG1 ( z8 retain :ARG0 ( z9 plant ) :ARG1 ( z10 water ) ) :ARG2 z9 ) )