There could be many reasons. It might be the stress of a lot of family arguments, or it could be happiness if your family has a good relationship. Health can also be mental as well as physical, so it really depends on the dynamics of the family.
Everyone. The alcoholic affects himself, his family and his friends. It also affects his work, which affects the people at work. He can also (if he drives intoxicated) get into an accident and hurt others he does not even know. If his health deteriorates, he will probably affect the health care system. He may also end up in the prison system.
Nutrition affects your health your entire life.
It depends what you mean. If you want to refer your health and your family's health, then use "Your and your family's health." But, if you want to refer to just you and your family's health, then use "You and your family's health.
smog affects the human health and harm the environment
no
it affects your family because they are jelous.
It affects your family by emotions.
Glutamic acid.
not really
Yes they do
it affects your health by having a heart attack
Factories that dump poisonous waste and chemicals into rivers affects a river's health. People who litter, pulp mills and oil rigs also affect river health.