20190618-asthma.jpg

Group of children running over playground grass

Media Folder

2019

Title

Group of children running over playground grass

Caption

The study found that cases of childhood asthma dropped as outdoor air became cleaner.

Credit

bowdenimages / iStock / Getty Images Plus

Description

Group of children running over playground grass
OD

Site_Section

NIH Research Matters

Alt Text

Group of children running over playground grass