Quote Originally Posted by Zandor
Ozone, a major smog constituent, inhibits the ability of plants to open the microscopic pores on their leaves and breathe, according to research published Tuesday in Proceedings of the National Academy of Sciences.

"Our work has shown, for the first time, that, rather than causing the pores or stomates on a plant's leaves to close, as was generally assumed, ozone actually inhibits stomatal opening by directly affecting the 'guard cells' that control the opening", said Gro Torsethaugen, a researcher at Penn State University


Here is the link if you wish to read more detail,
http://healthandenergy.com/ozone_damages_plants.htm

Peace
interesting article, thank you. i have two sharper image ionizer. one small desktop one in the closet and one regular size one in the room next to it. i'm not sure, but i know that the amout of O3 that is put out is very minimal and is safe for humans. i've read that ozone is not good for humans to be exposed to but the amounts of ozone these put out they say are below those readings.

so do you think it is okay for the plants with the devices i have? where it can have just enough to kill any free radicles? but not "harm" the plant.