They aren't sure what effect the trees have on the kids. Researchers say trees may help reduce asthma by encouraging children to play outdoors more.
Lower asthma rates on tree-lined streets
A new study done in New York found that kids who live on tree-lined streets have lower asthma rates. Researchers compared medical data of 4- and 5-year-olds to information about the number of trees, sources of pollution and population density.
