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.
Let's take a look at how the state senators' pay scale varies between Arkansas and California. In Arkansas, a lawmakerâs annual salary is a paltry $14,067; while in California, state senators and representatives are paid an annual salary of $110,880.outh vs. North, Salary Comparison. When comparing northern and southern states, the salary range is definitely higher up north. For instance, Michigan State Senators earn an annual salary of $79,650 per year, plus a $12,000 yearly expense allowance, which lifts their annual pay rate up to $91,650.