What makes people healthy can be the type of food they eat such as salad, vegetables and other foods. What makes people unhealthy is when they eat junk food or they eat fast food everyday. I am not saying that to offend anyone. It is just how their parents feed their children to eat the right food to live a healthy lifestyle. It is not only that people are healthy physically. It is also by trusting God with all of your heart. If you don't believe in God, that's okay. Other people exercise so they can lose weight. That is how people can people can be healthy and how people are unhealthy. I am not too sure how to explain the second question but I hope this answer helps you :)
T<span>here are </span>vast differences<span> in the health of population groups in the United States. </span>For example at the county level life expectancy for men ranges from a low of 65.9 years in Holmes County, Mississippi to a high of 81.1 years in Fairfax County, Virginia (a wealthy suburb of Washington, DC)—a difference of more than 15 years. Life expectancy for women ranges from 73.5 years Holmes County to 86 years in Collier County, Florida (which includes Naples), a difference of 12 and a half years.
There are also vast differences in behavior which is thought to affect health. At the county level, differences in smoking and excessive drinking vary by a factor of more than two to one. Adult obesity, physical inactivity and lack of access to healthy foods are 50 percent higher in some counties than in others.
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It will screw the food web up because invasive species can take over and kill other species therefore eliminating one or more food sources that that environment had.
