Everyone loves a breath of fresh air. Unfortunately, too often our air is anything but fresh.
While air quality varies dramatically from place to place and day to day, nearly the entire world — about 99% of the global population — is exposed to air at some point that doesn't meet the strict standards set by the World Health Organization, the agency has reported. Polluted air, laden noxious gasses or tiny, invisible particles that burrow into human bodies, kills 7 million people prematurely every year, the U.N. health agency estimates.
