As had been said, the environment plays a big roll during the high school and college years.

But your environment and lifestyle choices will play a role as well.

In many cases there is a blend of the two, which shows both genes and environment play a part.

Others believe that the environment plays the dominant role, many times in obvious ways.

Genetics, the environment, and perhaps even a virus may play a role.

The environment in the family played a major role in the development of its members.

An adolescent's environment plays a huge role in their identity development.

While no one knows all the reasons, experts say that genes and environment play a large role.

The environment must play a part in that, whether it is a matter of energy production or its transportation.

Completing our knowledge of the part the environment plays in various health problems will take time.