I was under the impression that H2S was a vapour, when it is actually a gas, just, at STP. That does save Quaritch some pain, but the fact that vehicles might be pressurized doesn't, since he walks straight out of the building into the open air at one point.

However, I think you are downplaying how much damage it'll do; the WW1 era British Army commented that H2S was "not an ideal war gas," at 1/10th the concentration it's apparently has in the atmosphere. Even small amounts of it in his eyes or windpipe would cause severe damage.

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...but in purple blue, I'm stunning!

How could the building not be pressurised? He kicks open a door, which doesn't have an airlock on it so I would guess is some kind of emergency exit. That's a BIG hole, so the internal pressure is lost all at once, as opposed to slowly when there is minor damage.

Chemical warfare in a context such as WW1 was ideally to injure rather than kill since then the enemy would be forced to spend more resources.

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Things change, but Avatar is always a part of us, our inspiration and our dream. We all follow it differently, but remember how it brought us together.
\m/ \m/

Living isn't easy when you're far away from home...

AND THEY ARE OFF!!! Place your bets now people! Who will win this scientific show down!!


Actually one thing to consider apart from earth's air is the gravity. For humans the lighter gravity of Pandora doesn't seem to bad, but the Na'vi may have a problem on earth. Depending on sciencey things I have no idea about the lower gravity could in theory cause their lungs to "collapse". The lighter atmosphere on earth would also be a problem.

Also, Earth's atmosphere is pretty much trashed by the time Avatar takes place. Sure human's can tolerate the smog (we adapted!) but to the Na'vi all those pollutants would be very deadly.

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Sweet is the lore which Nature brings;
Our meddling intellect
Mis-shapes the beauteous forms of things:
We murder to dissect.

Enough of Science and of Art;
Close up those barren leaves;
Come forth, and bring with you a heart
That watches and receives.

Not at +0.2G. Humans are fine exposed to a lot more than that via centrifuge.

The issue of Earth in the Avatar universe is a point worth considering though, but that's more of an issue than Earthlike general composition e.g. indoors at Hell's Gate.

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Things change, but Avatar is always a part of us, our inspiration and our dream. We all follow it differently, but remember how it brought us together.
\m/ \m/

Living isn't easy when you're far away from home...