Over 20 people were hospitalized with symptoms of chlorine poisoning after a swimming pool in Poland had up to ten times the normal amount of the chemical. Rescue services were alerted to chlorine poisoning at a swimming pool in Warsaw on Friday evening. During an examination, they discovered that the level of chlorine in the water had significantly exceeded the norm – at the bottom of the pool it was ten times higher than typical and on the water surface around three times higher. 21 people were taken to hospitals with symptoms of chlorine poisoning. Four children were still under observation…