Very few of these other types of oxidants are present in Wisconsin's ambient air. Other Effects Ozone causes noticeable leaf damage in many crop and tree species. Certain varieties of soybeans, clover, onions, spinach, muskmelon and alfalfa are especially susceptible. Trees, such as lilac, aspen and ash are also sensitive. Plant injury surveys by WDNR Air Monitoring staff have documented ozone damage on white pine and common milkweed.
Ozone can also weaken materials such as rubber and fabrics.