Minnesotans For Sustainability


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Sustainable Society:  A society that balances the environment, other life forms, and human interactions over an indefinite time period.








Most students of sustainability agree that human impact and sustainability can be reduced to two interdependent factors: the numbers and living standards.

Or  I = P x A x T (John R. Holdren & Paul R. Ehrlich, 1971)

    I  = Impact
    P = Population
    A = Affluence
    T = Technology/Wastes


I = Population x Standard of Living

Simply stated, given a level of technology, nourishing environment, and balance with other life-forms, a higher quality of life can be sustained with fewer than with larger numbers of inhabitants. Moreover, at some point, it is probable that the numbers could overwhelm a sustainable balance.

These relationships and the numbers are the focus of the following pages.

Population & Ecological Footprints
Limits to Growth: 30 Year Review
Myths, Truths, & Half Truths About Population Growth & the Environment
Malthus: Rationale and Principles
United States Population
Australian Population Issues
Canada's Population Growth
England's Population Issues
World Populationnew
Iran's Model Fertility Program
Population and Energy
Population Issues & Policies: Part 1 of 2
Population Issues & Policies: Part 2 of 2

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