Suffering From Asthma:
Growing more trees might not only make for a less polluted environment but also lower the incidence of asthma among children, according to a study.
Researches based their findings on a study of city children in the four-five age group. The study found that asthma rates in this age group fell by almost a quarter for every standard deviation increases in tree density, equivalent to 343 trees per square kilometer.
This pattern held true even after taking account sources of pollution, levels of affluence, and population density, all factors likely to influence the results.
Trees may be helping to curb asthma rates by encouraging children to play outdoors more then often or by improving air quality.