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The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries. Air quality in the database is represented by the annual mean concentration of particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively). [1 ...
Worsening air quality has prompted health alerts in New York and Quebec with officials warning people about the impact of fine particles known as PM2.5, which can lead to respiratory illnesses.
The smoke has shifted south and west in the US impacting cities like Chicago, Cincinnati, Pittsburgh and Cleveland after enveloping New York for days
Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems.
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The most commonly used air quality index in the UK is the Daily Air Quality Index recommended by the Committee on the Medical Effects of Air Pollutants (COMEAP). [39] This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general ...
US Live Ozone Map, U.S. Environmental Protection Agency; Air Quality Designations for Ozone, U.S. Environmental Protection Agency; Tropospheric Ozone, the Polluter UCAR (University Corporation for Atmospheric Research) (archived 2017) Ozone and Air Quality map, NASA; Total Ozone Mapping Spectrometer (satellite monitoring 1999–2011) (archived)
The Big Apple is suffering record levels of air pollution as wildfire smoke blowing in from Canada shuts down airports and cancels Wednesday’s MLB game between the Yankees and the White Sox