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  2. Humidity - Wikipedia

    en.wikipedia.org/wiki/Humidity

    It does not take temperature into consideration. Absolute humidity in the atmosphere ranges from near zero to roughly 30 g (1.1 oz) per cubic metre when the air is saturated at 30 °C (86 °F). [8] [9] Air is a gas, and its volume varies with pressure and temperature, per Boyles law. Absolute humidity is defined as water mass per volume of air ...

  3. Indoor air quality - Wikipedia

    en.wikipedia.org/wiki/Indoor_air_quality

    [citation needed] However, high humidity outdoors creates the need for careful attention to humidity levels indoors. High humidity give rise to mold growth and moisture indoors is associated with a higher prevalence of occupant respiratory problems. [citation needed] The "dew point temperature" is an absolute measure of the moisture in air ...

  4. Hygroscopy - Wikipedia

    en.wikipedia.org/wiki/Hygroscopy

    The word hygroscopy (/ h aɪ ˈ ɡ r ɒ s k ə p i /) uses combining forms of hygro-(for moisture or humidity) and -scopy. Unlike any other -scopy word, it no longer refers to a viewing or imaging mode. It did begin that way, with the word hygroscope referring in the 1790s to measuring devices for humidity level. These hygroscopes used ...

  5. LA fire crews make progress but dangers remain; EPA hazmat ...

    www.aol.com/los-angeles-fires-bring-risks...

    The Hurst Fire was 98% contained, according to CalFire. ... low humidity and drought contributed in a major way to the Los Angeles County fires. What remains elusive is the cause of their ignition ...

  6. Air quality guideline - Wikipedia

    en.wikipedia.org/wiki/Air_quality_guideline

    The guidelines stipulate that PM 2.5 should not exceed 5 μg/m 3 annual mean, or 15 μg/m 3 24-hour mean; and that PM 10 should not exceed 15 μg/m 3 annual mean, or 45 μg/m 3 24-hour mean. [2] For ozone (O 3 ), the guidelines suggest values no higher than 100 μg/m 3 for an 8-hour mean and 60 μg/m 3 peak season mean. [ 2 ]

  7. 98% of Californians now in CDC’s ‘high’ COVID-19 level. What ...

    www.aol.com/news/98-californians-now-cdc-high...

    Those counties combine for fewer than 650,000 of the state’s 39.5 million residents, meaning the federal agency is now advising more than 98% of Californians – the entire capital region, all ...

  8. Water content - Wikipedia

    en.wikipedia.org/wiki/Water_content

    Volumetric water content, θ, is defined mathematically as: = where is the volume of water and = + + is equal to the total volume of the wet material, i.e. of the sum of the volume of solid host material (e.g., soil particles, vegetation tissue) , of water , and of air .

  9. Gruyère cheese - Wikipedia

    en.wikipedia.org/wiki/Gruyère_cheese

    According to the AOC, the cellars to mature a Swiss Gruyère must have a climate close to a natural cave. This means that the humidity should be between 94% and 98%. If the humidity is lower, the cheese dries out. If the humidity is too high, the cheese does not mature and becomes smeary and gluey.