Редактирование: Guide to Atmospherics (раздел)

==Breathability==
<b>Do note that breathing is based on pressure and not moles!</b> Moles breathed has no bearing on suffocation, only on gas consumption.

Humans need 16 kPa of O2 to survive. When not breathing through internals this 16 kPa is supplied by the environment, with a normal 21-79 mix of 101 kPa O2-N2 
supplying 21 kPa of Oxygen to the lungs.

For internals this means that you are going to need a minimum of <b>16 kPa</b> release pressure on the tank (adjusted by clicking the tank while in hand). Unpure mixes will require a higher release pressure to be breathable!

===Consumption===
The consumption rate for gas is dictated by the moles breathed in, all oxygen intake will be consumed and turned into carbon dioxide. Lungs are considered to be 2 Litres. Mole consumption works as follows:
*For most scenarios this is equal to 2/2500th of the environment gas. 
*For internals this is further modified by the release pressure of the tank, with the breathed gas targeted to reach whatever release pressure set when inside the lungs. You can calculate this by using n = Release Pressure * 2 Litres / (8.31 * Temperature). A higher temperature will mean less gas will be breathed in per tick. <b> This does not mean a longer internal! </b> since the ratio of gas breathed in to the total gas in tank is still the same.

===Temperature===
Creatures start taking damage when the air breathed in is colder than 260 Kelvins or hotter than 360 Kelvins! This is separate from the cold or hot damage taken because a mob is too cold or hot though. There are damage increases in temperatures colder than 200 and 120 Kelvins or temperatures hotter than 400 and 1000 Kelvins. This damage is further multiplied for species such as lizards who take 3/2 times as much cold damage but 2/3rd as much hot damage.

===Notes on optimization===
*Pluoxium is considered to be 8 times as potent as Oxygen for breathing I.E. each kPa of pluoxium counts as 8 kPa. It's possible to run a pluoxium tank with release pressure as low as 2 kPa for a longer lasting internal.
*If external efficiency is important, it's possible for a hotter internal mixture to be made to conserve the amount of moles while still supplying an equal amount of partial pressure to the lungs.