The duck has flourished since the introduction of these boxes promoted to a large extent by Ducks Unlimited. I think if someone did a similar study on the Spotted owl we would find that all they really need is a food source, a place to nest and a water supply. Lightning puts holes in the ozonelayer. Volcanoes put out more chlorofluorocarbons into theatmosphere than mankind has put into the atmosphere sense the beginning of the industrial era to now and yet volcanoes have very little impact on the ozone layer. More studies need to bedone in order to be sure this is the case before we wily nily give up those freedoms.
Ozone is an irritating, pale blue gas that is explosive and toxic, even at low concentrations.
It occurs naturally in small amounts in the Earth's stratosphere, where it absorbs solar ultraviolet radiation,which otherwise could cause severe damage to living organisms on the Earth's surface. Under certain conditions,photochemical reactions between nitrogen oxides and hydrocarbons in the lower atmosphere can produce ozone in concentrations high enough to cause irritation of the eyes and mucous membranes. Ozone usually is manufactured by passing an electricdischarge through a current of oxygen or dry air. The extreme instability and reactivity of concentrated ozone makes its preparation both difficult and hazardous. These oxygen atoms then combine with nondissociated molecular oxygen to yield ozone.