COPD, or Chronic Obstructive Pulmonary Disease, pretty much says it all. In COPD the Bronchioles (the pathways of air to the Aveoli), become inflamed and are occluded by mucus, because the Cilia which are responsible for pushing it out of the tract have been damaged. Because of the narrowing, the Aveoli attempt to increase the surface area so that more oxygen can be absorbed by the lungs, however this can lead to a problem as the dead space (space that is not the aveoli and can be absorbed) is then expanded as well, which leads to shortness of breath.
The answer is that they are the building blocks from which proteins are made.
College students are not usually the most financially stable and junk food tends to be cheaper than healthy food. Therefore, college students can only afford to eat unhealthy foods. College students can try to find healthy alternatives that are cheap and try saving their money. Always make sure that their is a fruit or at least something healthy in their meal. If your parents want you to decrease your fat intake, a good thing to keep in mind is that eating later at night actually causes you to gain weight more than eating during the day.
They have lots of vitamins and minerals