State and local officials have struggled for years to get a handle on ozone, a type of pollutant regulated by the federal government. Ozone levels long appeared to be declining in the ...

Cities in California, Texas and Arizona are expecting air quality to become unhealthy for sensitive groups on Thursday.

Poor air quality expected in Houston Thursday ahead of a cold front. Experts advise limiting outdoor time, especially for ...

Across continents, “sacrifice zones” resemble wounds carved deep into the fabric of our planet. These are regions where ...

Lerma river system, the organization H2O Lerma Con Encanto is seeing results with eggshell and volcanic rock filters.

A year after severe drought created a water crisis in the Mexico City metropolitan areas, the Cutzamala resevoir system is ...

A provision in the secret, controversial agreement allowing a private company to transport uranium ore across the Arizona ...

The U.S. State Department's recent travel advisory update indicates that most popular tourist destinations in Mexico are safe ...