Closed but also open

We're not a perfectly closed system, there are leaks and inputs.

Video caption text
00:00
[Foreboding orchestral music]
[Gustav Holst: Mars, the Bringer of War]
00:22
[Music]
[Elgar: Pomp and Circumstance (Land of Hope and Glory)]
00:32
This is New Albion on Mars
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New Albion isn't a perfectly closed system.
00:39
There is regular movement of people, vehicles, and
materials in and out of New Albion's outer ports.
00:46
Whenever New Albion opens a door or duct to the
atmosphere of Mars,
00:51
small quantities of material - mostly gases and
vapours - are lost from New Albion.
00:58
Accidental leaks also from time to time leak through
New Albion's envelope, until they're fixed.
01:05
New Albion continually replenishes material lost
through leaks in the same way as
01:10
most of its internal space is originally
filled after envelope construction.
01:17
Our industrial areas process raw material from the
surface of Mars into vital substances,
01:22
including air and water.
01:25
Many gases are stored compressed in large
quantities as a 'cushion' against habitat leaks.
01:32
A large off-line reservoir of water ensures ample
supply in case of emergency.
01:39
A great deal of what would normally be 'spoil' from
mining activity is used inside New Albion as
01:45
aggregate for soil and heavy construction materials
where appropriate.
01:51
We don't so much mine for rare resources, as
convert as much as possible of the Martian surface
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into essentials for our habitat.
02:01
At New Albion, mining is life.
02:07
[Dissonant clashing orchestral music]
[Gustav Holst: Mars, the Bringer of War]
02:25
[orchestral music continues]