http://www.nasa.gov/audience/forstudents/9-12/features/912_liftoff_atm.html

The atmosphere is primarily composed of
Nitrogen (N2, 78%),
Oxygen (O2, 21%), and
Argon (Ar, 1%).
(H2O, 0 - 7%),
Ozone (O, 0 - 0.01%),
CARBON DIOXIDE (CO2, 0.01-0.1%)

How many sources (human and non-human) contribute to this 0.01 - 0.1%??

In percentage terms what do humans contribute to this 0.01-0.1%.

Even if humans are 100% responsible to carbon emissions then it's ONLY 0.01-0.1% of the atmosphere.

Australia ONLY contributes 1.2% to this 0.01-0.1%

And these idiot environmentalist are telling us that Australia cutting it's Carbon emissions by 5% will make a difference??? 

The reality is the environmentalists do not know in percentage terms how much carbon humans contribute to the carbon cycle

Professor Garnaut doesn't know and he's been paid to advise Labor on this issue

Yes but Water Vapor isn't as 'poisenous' as C02 (Carbon Dioxide)

Have a look at Scuba Divers with what C02 poisening can do.
Then you have FreeDivers who suffer "shallow water blackout" which usually ends in death if they dive alone.

When I worked in Hospitals, the poor patient  would be in a state if more than x4 visitors were in his/her room with the door shut. They tend to steal the 'good air' with their constant chatter and presence.
The room becomes stuffy and hot.
One poor patient had passed out, much to the ignorance of x15 visitors in his private room, chatting away amongst themselves.

I wish we had an atmosphere like the Dinosaurs had: constant 30C degrees at the equator, 10C degrees at the Poles. The sky was always 'hazy' so the sun wasn't as intense and bright. The Air was x3 as thick which assisted the great mass of the Dinosaurs.
"...ahhh, I feel better already"
Alas, the closest we get to such good stuff these days is a tank of Nitrox mix.

Case of Dave Shaw death: gradual buildup of C02 in bloodstream while on a Rebreather at depth of 276m in south Africa while trying to retrieve the body of a young diver.
-> the excessive level of work-rate that Dave Shaw had to do at that depth/pressure to untangle himself from the intrusive Camera mounting and rope, created excessive C02 levels.
-> many divers do die from being Narked, 02 toxicity (convulsions - mouthpeice is lost) and others
...but C02 buildup gives you that "narrowing of vision, spots before your eyes and eventual "sleep" or blackout towards eventual death.

Prof Simon Mitchell expressed the danger of C02 buildup in a seminar just this past weekend at the OzTek at Redfern.

I think you might have confused a Rebreather with somthing else Gizmo.
Rebreathers are used down to very great depths for longer periods with less decompression times due to mixes of gas.
The trick is to remove C02 through a "scrubber" so 02 can be 're-used' without excessive C02 levels.

Agree on the 'older' Rebreathers.

Dave Shaw's Death is contentious. I've read the Book and seen the clips. I tend to think it was a lot of circumstances, even his 'religious' background. But I think he was a very capable man, no different to Richard Branson wanting to try his luck at a lot of things. McFayden can be like a lot of Divers - too conservative: No Open Water student is 'worthy' until they dive 1000 dives in North Sea condtions, blah, blah (my father travelled 100km to school barefoot through blizzards blah, blah). Mc Fayden is a good diver though. But I think Shaw could have easily handled the body bag and recover. What he couldn't handle was the added Media intrusion of a Camera for the Media coverage.
I say this with the recent death of Mark Spencer (as recently highlighted at the Oztek last weekend) - who, in my view, succumbed to the added pressure/workload of the Media, in this case - National Geographic.
So in essence, I think it was the 'camera' (I vaguely remember that it was placed in an unfamiliar position due to size or something) that caused the death of Shaw which resulted in entanglement and eventual overload of C02 and thus death.

So Agnes Milowka would delve deeper into cave systems than ever before and discover whole new systems - its called "pushing the envelope". Captain Cook did so, as did Columbus, etc. Some live, some die.
I think Shaw's depth (and the recovery) was do-able but I think he was 'distracted' by the Media factor, as was Mark Spencer in a sadly 'fatal' way.
I know the feeling, I do some amazing things, but when people ask me to do it again for 'the camera', its a different ballgame.

I think Shaw would have succeeded if there was no Media aspect, but they went for the 'money' as paid for by the Media Coverage and their demands.

It_is_the_Darkness wrote on Mar 18^th, 2011 at 5:01pm:



"I think Shaw would have succeeded if there was no Media aspect, but they went for the 'money' as paid for by the Media Coverage and their demands."

So you think that his rebreather WOULD have worked if there hadn't been any 'there'????.....Oh please....

Errrm, excuse me, but it`s a bit hard to find a relevent connection between AGW, and scuba diving ackshully.