'Well-being can be sustained when activities:
1 - use materials in continuous cycles.
2 - use continuously reliable sources of energy.
3 - come mainly from the qualities of being human
(i.e. creativity, communication, movement, appreciation,
and spiritual and intellectual development).
Long-term well-being is diminished when activities:
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.'
source and more: http://www.sustainwellbeing.net/sustain.html
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