There is one factual error though. You wrote "tree line ... the line at which decimating weather conditions and a lack of oxygen make even the grittiest of vegetation struggle for survival"
The limiting factor that determines tree line is not lack of oxygen. Trees make oxygen. The limiting factor is liquid water. Tree line occurs where it is too cold for too much of the year for water to be in liquid form long enough to support large vegetation. Tree line varies in altitude throughout the world, depending upon ambient temperatures.
Thanks for the clarification ... the information is much appreciated.
"concentrated mess of outwardly disparate people -- hippies, outcasts, goth heads, emo boys and girls, and your everyday, run of the mill sketch-balls "
Hahahaha - So true