Chlorine in Pools May Cause Breathing Trouble Chlorine in Pools May Cause Breathing Trouble Chlorine in Pools May Cause Breathing Problems حساسية الجهاز التنفسي Chlorine in Pools May Cause Breathing Problems A 2004 study revealed Chlorine in Pools May Cause Breathing Problems induce asthma-like symptoms Chlorine in Pools May Cause Breathing Trouble bad for asthma sufferers