Colorado health officials are admitting little progress in combatting toxic ozone and asking the EPA for a pollution downgrade that will buy the state more time.

Among the children studied, 12.3 percent had asthma at the time of their 4- to 6-year checkup and 15.8 percent had wheezing.

The Texas Commission on Environmental Quality has issued an Ozone Action Day, also known as an Air Quality Alert, for the ...

Their computer model reproduced the chemistry and circulation of the air; the natural variations in temperatures and winds; and the minor changes in the amount of energy received from the sun. Newman ...

Four decades ago, scientists sounded the alarm after discovering a growing 'hole' in the ozone above Antarctica. This ...

The colorless gas is considered a secondary pollutant and usually remains high in the Earth's atmosphere where it helps ...