Proper noun
Spaceship Earth
The planet Earth, regarded as a closed system with limited resources.
But if they try saying in and out for a few days in fun, they find themselves beginning to realize that they are indeed going inward and outward in respect to the center of Earth, which is our Spaceship Earth. Source: Internet
Kenneth E. Boulding in his influential 1966 essay The Economics of the Coming Spaceship Earth identified the need for the economic system to fit itself to the ecological system with its limited pools of resources. Source: Internet