When ozone reaches a certain concentration, it will cause serious harm to the human body. When people inhale ozone, ozone will cause a burning sensation in the respiratory tract due to its strong oxidation effect, causing congestion or inflammation of the respiratory system, children, the elderly and people suffering from People with respiratory illnesses are particularly affected by ozone. Experts estimate that in Europe, ozone pollution has increased the death rate of Europeans by 2% to 12%. Can we infer from this? ['Ozone pollution is currently the worst in Europe.', 'Low concentrations of ozone are not harmful to the human body.', 'The strong oxidizing effect of ozone is why it is harmful to people.', 'People with respiratory diseases are most sensitive to ozone pollution.']