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.
The current salary for senators, representatives and members of the  house is around 174,000 dollars. This is the average in the nation  for these workers. The amount of pay is set by statute. Currently both the Senators and Representatives are paid $1,801.00 per month. The Speaker of the House and the President of the Sena â¦ te are paid twice that amount.