Health effects associated with ozone in China: A systematic review

Area of Science:

• Environmental Health
• Public Health
• Toxicology

Background:

• Ozone (O3) pollution is a growing environmental health concern in China.
• Existing studies on O3's health impacts are limited in scope, particularly regarding regional and group-specific effects.
• High O3 concentrations pose a significant threat to human health, necessitating a comprehensive review.

Purpose of the Study:

• To systematically review the relationship between O3 pollution and mortality/morbidity across China.
• To focus on regional and group-specific impacts of O3 exposure.
• To identify limitations in current research and suggest future directions.

Main Methods:

• Systematic literature review of studies on O3 pollution and health outcomes in China.
• Analysis of regional and demographic variations in O3-related health risks.
• Discussion of O3's health effects under various conditions (heatwaves, multi-pollutants, climate change).

Main Results:

• High O3 concentrations are linked to increased risks of premature mortality and morbidity from respiratory and cardiovascular diseases.
• Severe O3 pollution in Northern and Eastern China has significantly increased premature mortality.
• Specific impacts include decreased lung function in the elderly (East China) and higher asthma risk in young people (South China).

Conclusions:

• O3 pollution poses a substantial threat to human health in China, with notable regional variations.
• The elderly and children are identified as vulnerable populations requiring further investigation.
• Enhanced research is crucial for understudied regions (Southwest, Central, Northeast, Northwest) to understand localized O3 health impacts and inform public health strategies.