PHOENIX — Arizonans are urged to work from home to prevent more pollution as the Valley is under an Ozone High Pollution Advisory on Thursday and Friday.
The Maricopa County Air Quality Department said the levels are expected to exceed the federal health standard for ozone.
“Ground-level ozone forms when emissions from vehicles, gasoline and diesel equipment, industrial and chemical processes, and other everyday activities react to sunlight,” a statement from the department said…