The phrase "healthy air" is correct and usable in written English.
It can be used when discussing air quality that is free from pollutants and beneficial for health.
Example: "To maintain a healthy lifestyle, it is essential to breathe in healthy air, especially in urban areas."
Alternatives: "clean air" or "pure air".
Only three out of 51 monitoring stations recorded "healthy" air.
Then he wiped his face and began to take quick breaths of the clean, healthy air.
Last year, it declared a "war against pollution," but conceded that Beijing will not likely achieve healthy air before 2030.
ClientEarth and other air pollution campaigners including Friends of the Earth, Greenpeace and the Healthy Air campaign dismissed the resulting plan as inadequate.
Word got out because the company that makes them crowed in its promotional materials: "Creating clean, healthy air for our national leaders is a blessing to the people".
In contrast, a single monitor operated by the United States Embassy in downtown Beijing, where traffic is heavy, consistently reports less healthy air conditions than the official index.
But aside from a few healthy air-mile accounts and an unhealthy dose of jetlag, what have they got to show for it?
The State of the Air report provides clear "proof that cleaning up pollution results in healthier air to breathe.
"Cleaner lawn mowers mean less summertime smog and healthier air for millions of kids," said Vickie Patton of the Environmental Defense Fund.
A key provision in the Clean Air Act that the Bush administration is trying to weaken continues to produce major gains in terms of cleaner, healthier air.
The government could bring us healthier air and less congestion by raising fuel duty and using the money to reverse the devastating cuts to buses.
