United States Department of Agriculture
Ozone is the product of chemical reactions that take place inÂ the lower atmosphere when volatile organic compounds mixÂ and react with nitrogen oxides in the presence of sunlight.Â Ozone exposure, uptake, and sensitivity all play importantÂ roles in the response of plants to ozone. Weather patterns andÂ changes in emissions of precursors account for a majority ofÂ ...
Ozone injury across the Southern United States, 2002–06
In the Eastern United States, hourly concentrations of ozone typically range from 30 to 50 parts per billion(ppb), with events that may exceed 100 ppb. Typical exposure levels can cause visible foliar injury to