### gas:

Real gas
* act like an ideal gas only under a specific range of conditions.
* attract one another at some distances.
* behave most like ideal gases under high temperature and low-pressure conditions.
* occupy volume which reduces the volume actually available to each gas particle.

Sewer gas
* are gases
  - methane gas, and therefore, are very deadly and explosive
  - mostly methane, which is toxic and potentially explosive under the wrong conditions
* can cause health problems for building occupants
  - enter a home through a floor drain or through a blocked gas vent
* eats cement.
* is heavier than air and contains very little oxygen.

### gas:

Shielding gas
* protects the weld by being a pocket of gas around the weld.
+ Welding, Arc Welding, Shielding in arc welding: Construction :: Technology
  * Shielding gas protects the weld by being a pocket of gas around the weld. The purpose of this gas is to keep normal air out, especially oxygen. It is different from flux because there is no liquid on the weld. There is only a gas around the weld. Because there is no liquid, it will not clean up dirt and other things on the metal. This means that the metal has to be clean before it is welded.

Sulphur dioxide
* Most sulphur dioxide affects climates
  - is produced by coal- burning smelters, power plants and factories
* releases into air.

Trace gas
* absorb solar energy, resulting in greenhouse warming of the earth.
* are mainly carbon dioxide and water vapor.

Unleaded gas
* are less efficient than the leaded gases of the past.
* is found throughout Mexico at all gas stations.

Unleaded gasoline
* is called benzina fara plumb
  - benzyna bezolowiowa
  - essence sans plomb
* is called gasolina sin plomo or gasolina sem chumbo
  - kursunsuz benzin
  - gasoline
* is known as blyfrei normal or blyfrei super
  - lyijyton polttaine
* provides the same power and performance as leaded gasoline.

### gas:

Vapor
* acts as simple asphyxiant, reducing oxygen available for breathing and is heavier than air.
* can travel distances to ignition source and flash back.
* condenses to form liquid.
* forms explosive mixtures with air.
* is composed of tiny drops of water that are light enough to stay airborne.
* is heavier than air and can cause suffocation by reducing the available oxygen for breathing
  - cause suffocation by reducing the oxygen available for breathing
  - travel to source of ingnition and flashback
  - of greater density than heat and of lesser density than water
  - pure combination of essential oils
* poses another barrier to developing life.
* reduces amount of oxygen available for breathing
* surrounds the planet but is unevenly distributed.

Various gas
* exist in outer space.
+ Interstellar medium: Stars :: Astrophysics
  * Various gases exist in outer space. Most common is hydrogen, followed by helium.

### gas:

Volcanic gas
* Most volcanic gases are noxious and smell bad, but they can cause mass fatalities
  - can have effects
* Some volcanic gases form acid droplets in the atmosphere
  - gasses are highly toxic
* can also severely damage vegetation
  - be very very dangerous
* can have a variety of toxic effects
* carries a large amount of volcanic dust.
* es account for most of the Earth's current atmosphere.
* have many impacts on climate, environment and people
  - no effect on ozone
* include dioxide

### gases:

Intestinal gas
* Most intestinal gas is produced from dietary carbohydrates.
  - organic matter
* can be extremely painful.
* cause a desire to farts.
* is just a natural part of digestion.

Molecular hydrogen
* collects at small inclusions within the steel and forms microblisters.
* has two main roles in interstellar space.
* is gases.
* is the primary ingredient in the creation of stars
  - species most often studied
* lies in cold clouds, where stars form.
* possesses no permanent dipole.