As altitude increases, the available amount of oxygen to sustain mental and physical alertness decreases with the overall air pressure, though the relative percentage of oxygen in air, at about 21%, remains practically unchanged up to 21,000 metres (70,000 ft).
  State legislators in Texas (both representatives and senators) make a salary of $7,200 per year.
How much money does a Ohio Senator and a Ohio Representative make? Regular members of both the house and senate make $58,934 a year with increasing salaries for leadership posotions and supplements for committee work.