"Healthier air" refers to air that is cleaner and safer to breathe, which can have positive effects on our overall health and well-being. Full definition
I hope very soon a new revolution will take place in my city - a change for healthy air. (tes.com)
How does a country support and facilitate exponential intellectual growth and at the same time, lack the infrastructure to provide clean water and healthy air quality? (gse.harvard.edu)
During colder months, use the padding and simply remove it for those hot days to provide healthy air circulation. (stroller-envy.com)