This category deals with environmental sustainability on a global geographic scale.
Some starting points for the topic of environmental sustainability in general:
ACTIVITIES ARE SUSTAINABLE WHEN THEY:
1 Use materials in continuous cycles.
2 Use continuously reliable sources of energy.
3 Come mainly from the non-destructive use of materials (i.e. creativity, communication, coordination, appreciation, and spiritual and intellectual development.)
ACTIVITIES ARE NOT SUSTAINABLE WHEN THEY:
4 Require continual inputs of non-renewable resources.
5 Use renewable resources faster than their rate of renewal.
6 Cause cumulative degradation of the environment.
7 Require resources in quantities that undermine other people's well-being.
8 Lead to the extinction of other life forms.