Environmental space One of the more useful concepts to have evolved in recent years is the idea that each of us takes up ‘environmental space’ in terms of the amount of materials and energy we consume,and the amount of pollution and waste we create (FoE 1997). The Earth has finite overall environmental space because there are limits to the amount of resources we can extract and limits to the ability of ecosystems to tolerate pollution. In developed countries,each person’s ‘environmental space’ is widely considered unsustainable (WCED 1987). Although only 20 per cent of the population live in the industrialized north,it (we) currently consumes over 80 per cent of the world’s resources. Such inequities are not only unethical but also unsustainable.