Atmosphere

Planets often have atmospheres. Atmosphere content and density determine whether the air is breathable by creatures. Plant life can survive is more harsh atmospheres than creatures.

Density

Density is expressed as a percentage value from 0 to 100%. Atmosphere density between 15 and 85 percent can be habitable and breathed; below 15% creatures cannot draw enough air into their lungs; above 85% creatures cannot force the air out of their lungs.

Density Terms [1]

Percentage	Name	Plants	Creatures
0%	Vacuum
1% to 9%	Trace
9% to 14%	Very Thin	Possible
15% to 39%	Thin	Possible	Breathable
40% to 70%	Ideal	Possible	Breathable
71% to 85%	Thick	Possible	Breathable
86% to 100%	Oppressive	Possible

Atmosphere Types

Atmospheric content is classified into categories.

Class	Animals	Plants	Description
Standard	Possible	Possible	Atmosphere is a good mix of breathable gases with few impurities.
Tainted	Possible	Possible	Atmosphere is a tolerable mix of gases to breath. Air may contain visible levels of impurities.
Exotic	*	Possible	Atmosphere is poisonous to people and animals but may host plant life. EV suit required.
Corrosive (green)			Atmosphere is poisonous to all plant and animal life. Corrosive to all equipment.
Insidious (purple)			Atmosphere is extremely poisonous to all plant and animal life. Extremely corrosive to all equipment.

*Only in gas giant oceans, and animals here are larger in size

As a Commodity

Atmosphere Density
Nominal Cost
10.00¢
Weight
0.00kg
Pack Size
n/a

Frigid Atmosphere Density
Nominal Cost
10.00¢
Weight
0.00kg
Pack Size
n/a

Inferno Atmosphere Density
Nominal Cost
10.00¢
Weight
0.00kg
Pack Size
n/a

Atmosphere density is an environmental commodity used by processes that require an atmosphere.

Processes that use atmosphere density will fetch it from the environment, but the chance of a successful fetch depends on how dense the atmosphere density and percentage of the gas in the atmosphere, which appears in survey reports as the atmosphere density of the world and individual gas percentage.

For example a wind power plant requires just an atmosphere and is therefore only affected by the atmosphere density. But a refinery requires both an atmosphere and the specific gaseous resource which means that it is affected by both the atmosphere density and the percentage of the specific gas.

A spacecraft using an atmospheric condenser bay has its harvesting yield affected by both the atmosphere density and the percentage of the specific gaseous resource.