The is considered the largest, most respected sports medicine and exercise science organization in the world.

a. nchs
b. usda
c. dhhs
d. acsm

be confident on yourself. ignore such fools and move on ; )

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.