Search results
Results From The WOW.Com Content Network
The US embassy in Beijing regularly posts automated air quality measurements at @beijingair on Twitter. On 18 November 2010, the feed described the PM2.5 AQI (Air Quality Index) as "Crazily bad" after registering a reading in excess of 500 for the first time.
The United States Environmental Protection Agency (EPA) has developed an Air Quality Index that is used to report air quality. This AQI is divided into six categories indicating increasing levels of health concern. A PM 2.5 concentration lower than 12 μg/m 3 indicates good air quality and between 12 and 35 μg/m 3 the
An individual score (Individual Air Quality Index, IAQI) is calculated using breakpoint concentrations below, and using same piecewise linear function to calculate intermediate values as the US AQI scale. and The final AQI value can be calculated either per hour or per 24 hours and is the max of these six scores.
The AQI will reach a code red when the index value surpasses 151. "Some members of the general public may experience health effects; members of sensitive groups may experience more serious health ...
In Q4 2023, half of the cities targeted by the December air quality action plan missed their targets to cut concentrations of hazardous particles, known as PM2.5, while in Q1 2024 41% of the ...
Thus an AQI of 100 does not mean twice the pollution of AQI at 50, nor does it mean twice as harmful. While an AQI of 50 from day 1 to 182 and AQI of 100 from day 183 to 365 does provide an annual average of 75, it does not mean the pollution is acceptable even if the benchmark of 100 is deemed safe. This is because the benchmark is a 24-hour ...
Photograph taken inside the U.S. Embassy in Beijing of Ambassador Gary Locke with Chen Guangcheng. The current U.S. Embassy in Beijing was opened and dedicated on August 8, 2008, by U.S. President George W. Bush [3] and is the third largest American diplomatic mission in the world, after the Embassy of the United States, Baghdad and the Embassy of the United States, Yerevan.
Dialogue Earth was started in 2006 as China Dialogue. [2]In 2011, it played a significant role in public discourse about air pollution in Beijing, after publishing a report comparing official air pollution figures with figures published by the US embassy in Beijing; the public discussions led to a change in policy by the Chinese environmental ministry.