One in 7 New Zealand children take medication for asthma, in fact it's one of the most common causes of hospital admissions for kids.
But why do some get it and some don't? A new Massey University study has found the answer lies in the flora that surrounds them.
More plant life means a lower chance of asthma. To explain we're joined by author of the study, Jeroen Douwes, Professor of Public Health at Massey.