Ozone is a highly reactive chemical which irritates the respiratory system. The elderly, very young, and those with asthma or other respiratory problems are most at risk. On hot, sunny, high-ozone days, even healthy people will find it harder to breathe when they exercise outdoors. Yes, ozone can damage crops, plants and other living things. Important crops such as soybeans and tobacco, as well as forests and garden plants, can be damaged by ozone.
Ozone also degrades rubber and plastic products.
Because some of the vapors become liquid again once they are returned to the underground gasoline tank, it is estimated that about three million gallons of gasoline will be saved each year in Maryland. This will greatly reduce any leaking vapors. Adding gasoline to the tank after the nozzle has clicked itself off overloads the vapor recovery system and may cause liquid leaks of gasoline. Avoid spilling gasoline when you refuel.