Asthma is one of the most frequent causes of absenteeism in schools. This disease, that affects the respiratory tract, can alter sleep, play and other activities necessary for proper child growth.
In industrialized countries, a progressive rise in asthma has been observed. The condition is prevalent between 3 and 30% of school year children aged 6 and 7 years old.
The total number of children suffering from this chronic disease increased by 75% between 1980 and 1994. And it is going to get worse because of the increment in emissions.
More info: http://www.libelium.com/preventing-asthsma-sensor-network-air-quality-pm10-dust-in-play-area/