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  2. Soil gas - Wikipedia

    en.wikipedia.org/wiki/Soil_gas

    Soil gases (soil atmosphere [1]) are the gases found in the air space between soil components. The spaces between the solid soil particles, if they do not contain water, are filled with air. The primary soil gases are nitrogen, carbon dioxide and oxygen. [2] Oxygen is critical because it allows for respiration of both plant roots and soil ...

  3. Category:Explosive gases - Wikipedia

    en.wikipedia.org/wiki/Category:Explosive_gases

    Only pure chemicals belong here not fuel air mixtures to be here a gas must have an upper explosive limit of 100%. Pages in category "Explosive gases" The following 9 pages are in this category, out of 9 total.

  4. Gas explosion - Wikipedia

    en.wikipedia.org/wiki/Gas_explosion

    A balloon filled with gaseous hydrogen exploding.. A gas explosion is the ignition of a mixture of air and flammable gas, typically from a gas leak. [1] In household accidents, the principal explosive gases are those used for heating or cooking purposes such as natural gas, methane, propane, butane.

  5. List of highly toxic gases - Wikipedia

    en.wikipedia.org/wiki/List_of_highly_toxic_gases

    Highly Toxic: a gas that has a LC 50 in air of 200 ppm or less. [2] NFPA 704: Materials that, under emergency conditions, can cause serious or permanent injury are given a Health Hazard rating of 3. Their acute inhalation toxicity corresponds to those vapors or gases having LC 50 values greater than 1,000 ppm but less than or equal to 3,000 ppm ...

  6. Chemical hazard - Wikipedia

    en.wikipedia.org/wiki/Chemical_hazard

    Explosive (exploding bomb) Flammable (flame) Oxidizing (flame above a circle) Corrosive (corrosion of table and hand) Acute toxicity (skull and crossbones) Hazardous to environment (dead tree and fish) Health hazard/hazardous to the ozone layer (exclamation mark) Serious health hazard (cross on a human silhouette) Gas under pressure (gas cylinder)

  7. Explosive levels of methane have been detected near a ... - AOL

    www.aol.com/news/explosive-levels-methane...

    Environmental regulators have found explosive levels of methane in a popular Berkeley park. Regulators and the city are sparring over the source of the gas and what to do about it.

  8. List of gases - Wikipedia

    en.wikipedia.org/wiki/List_of_gases

    This list is sorted by boiling point of gases in ascending order, but can be sorted on different values. "sub" and "triple" refer to the sublimation point and the triple point, which are given in the case of a substance that sublimes at 1 atm; "dec" refers to decomposition. "~" means approximately. Blue type items have an article available by ...

  9. 50 pounds of 'improvised' explosives found at 'bomb-making ...

    www.aol.com/50-pounds-improvised-explosives...

    A 28-year-old man was arrested and charged after authorities discovered "improvised explosive devices in a makeshift laboratory" at his Philadelphia home, officials announced on Wednesday.