does anyone know what the effects of low level ozone is on animals and plants?

Question

Moderate to high levels of ozone causes respiratory problems in animals. it also slowly kills trees. This can be seen in portions of the San Bernardino Mountains affected by Los Angeles Basin smog. According to

http://www.epa.gov/ttn/oarpg/naaqsfin/o3health.html

"Ground-level ozone interferes with the ability of plants to produce and store food, so that growth, reproduction and overall plant health are compromised"