TIANJIN, China, June 10 (Bernama) -- According to the latest release from the Administrative Committee of the China-Singapore Tianjin Eco-City, the concentration of negative oxygen ions monitored at Yongdingzhou Park within the eco-city reached 7,100 ions per cubic centimeter in May 2026, hitting a record high for the same period in history.
Known as "vitamins in the air," negative oxygen ions are a key indicator of air quality. The higher their concentration, the fresher and more invigorating the air feels. Absorbed through the respiratory tract and skin, negative oxygen ions benefit the human respiratory, nervous, metabolic, immune and cardiovascular systems.
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