Figure 3: PM 2.5 trends, by monitoring site in Aotearoa, 201623 Figure 4: Days above 24-hour 2021 World Health Organization air quality guideline for PM 2.5 , by monitoring site, 202023 Nitrogen dioxide concentrations continue to improve at most sites, but 60 percent of sites were above the 24hour WHO guideline between 2020 and 2023 Regional councils and unitary authorities, as well as the New Zealand Transport Agency | Waka Kotahi (NZTA), monitor NO 2 concentrations
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Factors like a balanced diet, regular exercise, sufficient sleep, and managing stress all play a role in naturally maintaining healthy testosterone levels