actually the lungs of an asthmatic can be quite normal. it is a chronic inflamation of the bronchial area leading to the lung which cause plumonary or breathing problems. it is very serious and i hope the children of my home town, New York City are ok. of course all the toxic pollution is very bad and is the underlining problem. also city planners figured by putting in only male trees which have pollen there would be very little clean up involved. the pollen would blow away. however, this is abnormal in nature and female tree which have pods should also be planted.