Related topics: air pollution · pollution

Plan to reduce air pollution chokes in Mexico City

Decades ago Mexico City's air pollution was so poor, birds would fall out of the sky—dead. Locals said living there was like smoking two packs of cigarettes a day, according to one report. In response, Mexico City took ...

Innovative software converts Wi-Fi data into energy savings

For the first time in Canada, a University of British Columbia engineer has found a way to use Wi-Fi to determine the number of building occupants and adjust ventilation accordingly – saving energy without sacrificing air ...

Rush hour pollution may be more dangerous than you think

The first in-car measurements of exposure to pollutants that cause oxidative stress during rush hour commutes has turned up potentially alarming results. The levels of some forms of harmful particulate matter inside car cabins ...

Canned air and water-spraying drones: Smog remedies

As millions of people in Asia choke under polluted skies, authorities have turned to water-dispersing drones and outdoor air purifiers to improve air quality, while companies have tried to cash in by selling everything from ...

Researchers unveil new hyper-local air pollution map

Engineering researchers at The University of Texas at Austin have developed the most detailed and extensive local map of air pollution ever produced for an urban area, using specially equipped Google Street View cars to measure ...

What you should know about air quality alerts

"It's a code red day for ozone." If you hear this on your local news, what does it mean? Are you at risk? Do you know what to do? An air quality alert like this informs the public about pollution levels in the air and advises ...

page 1 from 23

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.

This text uses material from Wikipedia, licensed under CC BY-SA