There is some dispute over the hazards of handling methanol and its probable impact on ozone formation.

Nor does it get involved with air pollution topics such as acid rain and ozone formation.

Pine trees have compounds that can contribute to ozone formation.

But the industry study, released Wednesday, says that adding oxygenates does not affect ozone formation.

Hydrocarbons also contribute both to acid rain and to ozone formation.

This enables predictions of ozone formation at a particular location to be made and allows local authorities to take remedial action.

This change in the law reflected significant changes in scientific understanding of ozone formation and depletion.

They too contribute to ozone formation; it just takes them longer.

In light of the insufficient scientific knowledge on ozone formation, the Commission cannot accept any of those amendments.

These emissions contribute to ozone formation, which is one of the air pollution problems we have still not solved.