1.
a large, round object such as Earth that orbits a star
2.
allowing people to do or believe what they want although you do not agree with it
3.
a course of action chosen to guide people in making decisions
4.
formal talks given to a group of people in order to teach them about something
5.
causing little or no damage to the environment, so the activity can continue for a long time
6.
a person who represents or promotes a particular activity
