air and why are these critics fired up? >> well, martha, gets a little technical and right now the allowable ozone levels over an 8-hour period is 75 parts per billion. okay? so, the epa is proposing to lower those allowable limits, to between 60 or to 70 parts per billion. sounds like a good deal and wouldn't be that hard to do but it is, because ozone levels have been coming down, 25%, since 1980. and that is mainly through increased efficiencies in automobiles and formulated gasoline and the supporters of this, including the american lung association, say, look, this ills a gos a good thing, b owe zoep we know is a nasty, toxic gas and has short-term health effects, especially on people who have asthma, or respiratory illness, we know that the rates of asthma are going up, and one in ten kids, now suffers from asthma. so we know that reducing ozone exposure to those people will be a good thing and we also know