Diseases, Conditions, Syndromes

Delhi wakes to post-Diwali smog

New Delhi woke up to a thick blanket of toxic smog on Friday after an overnight barrage of firecrackers for the Hindu festival of Diwali in the Indian megacity, despite a ban on selling them.


What is the health impact of wildfire smoke?

California, home of the freeway and the car-based lifestyle, has long struggled with air pollution—and been a pioneer in cleaning up the air, for example in vehicle emission standards. But in recent years, a new threat ...

Alzheimer's disease & dementia

Studies show that clean air matters for a healthy brain

Two USC researchers whose work linked air pollution to a greater risk of Alzheimer's disease and faster cognitive decline are seeing signs that cleaner air can make a difference in brain health.

Medical research

Ozone exposure link to the development of type 2 diabetes

Older Californians who live in communities with poor air quality, even those who engage—as recommended—in physical activities but do so outdoors, have a higher risk of Type 2 diabetes, a complex and chronic metabolic ...

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Air Quality Index

The Air Quality Index (AQI) (also known as the Air Pollution Index (API) or Pollutant Standard Index (PSI)) is a number used by government agencies to characterize the quality of the air at a given location. As the AQI increases, an increasingly large percentage of the population is likely to experience increasingly severe adverse health effects. To compute the AQI requires an air pollutant concentration from a monitor or model. The function used to convert from air pollutant concentration to AQI varies by pollutant, and is different in different countries. Air quality index values are divided into ranges, and each range is assiged a descriptor and a color code. Standardized public health advisories are associated with each AQI range. An agency might also encourage members of the public to take public transportation or work from home when AQI levels are high.

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