Lots of geeky scientific details.... (Link...)

Some initial notes:

1. 1997 standard not adequate to protect public health, based on > 1700 studies. Clinical studies show evidence of adverse respiratory response in HEALTHY adults at old standard (80 ppb).
2. First evidence linking high ozone to mortality (deaths) in sensitive popultions
3. High ozone also reduces crop yields and increases susceptibility to disease and insects (e.g., threatens our food production)