Soot, smoke, mold, pollen, methane, and carbon dioxide are a just few examples of common pollutants. In the U.S., one measure of outdoor air pollution is the Air Quality Index, or AQI which rates ...

Air pollution is the second leading risk factor for death globally, with most of the world population subject to harmful air ...

Experts said the real amount of air pollution might be far greater as many parts of the world lack the monitoring needed for more accurate data. In Africa, for example, there is only one ...

Scientists have also explored how and why different types of air pollution harm health. Some particles, for example, are so small they can be inhaled deep into people's lungs, where they irritate ...

Air pollution is the world’s second-largest ... In the Bay Area, for example, the concentration of devices is far denser in affluent Palo Alto, with six outdoor monitors in a neighborhood ...