the social context

message from our future

ecological footprints

» FAQ/terms of endearment

carrying capacity


As present, humans would need two more planets like Earth to sustain current rates of growth and consumption. We are living beyond the carrying capacity of the earth.

However, at least one poll indicates that humans believe they ought to be allotted only 20 per cent of the bio-productive land and sea for their use, and that 80 per cent should be left wild for the other 25 million species.

ecological footprint


An ecological footprint is related to carrying capacity. It estimates the total productive land area required to support the consumption and waste requirements of an individual or community.

Calculating an ecological footprint means taking into account all resources extracted, every item consumed and everything thrown away.

Click here to estimate your individual ecological footprint.

environmental stewardship


A steward is entrusted with the management of someone else’s property. Environmental stewardship means managing the earth's resources (which do not really belong to us) carefully and with their long-term integrity at heart.

healthy riversheds


If health is a state of balance free of disease and unencumbered by injury, a state where the body is able to replenish its energy and maintain equilibrium in its interactions with the world, then a healthy rivershed is a place where the Earth’s capacity to regenerate or to sustain life is not unduly impaired. It is a place where human activity has zero net impact – that is, a place where human presence is not reinforced by mechanization and indifference. It represents a sustainable ecological footprint for each community member.

sustainable communities


In 1987, the World Commission on Environment and Development defined sustainability (or sustainable development) as “development which meets the needs of the present without compromising the ability of future generations to meet their own needs”. Supporting this definition is an ethic of care and respect for the biosphere and all living things, a recognition that nature has limits, and the knowledge that we have no choice but to live within those limits.

A sustainable community is one whose economic activities do not outstrip the carrying capacity of the rivershed where it resides. It measures progress according to quality of life indicators, not gross domestic product (GDP) alone.