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The air quality index in New Jersey has returned to moderate levels after reaching unhealthy standards on Tuesday, triggering an air quality advisory from state environmental officials. "Sensitive ...
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The weather service and state DEM provide some tips on avoiding health problems due to heat and bad air.
Ground-level ozone (O 3), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas.
Ozone cycle illustrated over image by NASA astronaut Scott Kelly. Ozone is a ubiquitous yet highly reactive molecule in the atmosphere. Such a highly reactive oxidizer would normally be dangerous to life but ozone's concentration at sea level is usually not high enough to be toxic.
Diesel engines, ports, motor vehicles, and industries are main sources of air pollution in Los Angeles. Frequent sunny days and low rainfall contribute to ozone formation, as well as high levels of fine particles and dust. [94] The strong relationship between AQI and ozone levels may be found on air pollution maps. [95]
The highest levels of ozone in the atmosphere are in the stratosphere, in a region also known as the ozone layer between about 10 and 50 km above the surface (or between about 6 and 31 miles). However, even in this "layer", the ozone concentrations are only two to eight parts per million, so most of the oxygen there is dioxygen, O 2 , at about ...
On Wednesday, Bangor, Maine, had a heat index of 106 degrees — the highest ever for the city. Boston also hit a high of 98 degrees , breaking the previous daily high of 96 set in 1923.