The income per capita in Phoenix is 16% lower than the national average. The median household income in Phoenix is 12% lower than the national average. Male median earnings are 41% higher than female median earnings. The unemployment rate in Phoenix is 11% higher than the national average. The poverty level in Phoenix is 49% higher than the national average.
One major internal environmental influence that affects gene expression is gender, as is the case with sex-influenced and sex-limited traits. Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.
Research reveals that environments can increase or reduce our stress, which in turn impacts our bodies. What you are seeing, hearing, experiencing at any moment is changing not only your mood, but how your nervous, endocrine, and immune systems are working. The stress of an unpleasant environment can cause you to feel anxious, or sad, or helpless. This in turn elevates your blood pressure, heart rate, and muscle tension and suppresses your immune system. A pleasing environment reverses that. And regardless of age or culture, humans find nature pleasing.