The extra time and effort spent on proper tree planting is a small investment for the long dividends paid by a tree in the ...

Arizona’s air is getting cleaner—but not clean enough. A new report from the American Lung Association shows some wins for ...

The project is taking advantage of demand expected to arise at the opening of TSMC's Arizona fabrication plant.

A new report from the American Lung Association shows that Phoenix's ozone problem is worsening, while its particulate ...