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.
Some kids who suffer from asthma may not have enough trees in their neighborhood.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.