A nonnative species introduced into a new area.
Exports: goods or services sold to another country.
Export earnings: the money a country earns from selling goods or services to other countries.
Extended family: a family that may include grandparents and other relatives as well as their children.
A livelihood, such as hunting and gathering that requires the use of large land areas.
Consequences of goods and services that are not priced into the initial cost of those goods and services.