World - Humanity can and must do more with less

By 2050, humanity could devour an estimated 140 billion tons of minerals, ores, fossil fuels and biomass per year - three times its current appetite - unless the economic growth rate is "decoupled" from the rate of natural resource consumption, warns a new report from the United Nations Environment Programme.

Developed countries citizens consume an average of 16 tons of those four key resources per capita (ranging up to 40 or more tons per person in some developed countries). By comparison, the average person in India today consumes four tons per year.

With the growth of both population and prosperity, especially in developing countries, the prospect of much higher resource consumption levels is "far beyond what is likely sustainable" if realized at all given finite world resources, warns the report by UNEP's International Resource Panel.

Already the world is running out of cheap and high quality sources of some essential materials su! ch as oil, copper and gold, the supplies of which, in turn, require ever-rising volumes of fossil fuels and freshwater to produce.

Improving the rate of resource productivity ("doing more with less") faster than the economic growth rate is the notion behind "decoupling," the panel says. That goal, however, demands an urgent rethink of the links between resource use and economic prosperity, buttressed by a massive investment in technological, financial and social innovation, to at least freeze per capita consumption in wealthy countries and help developing nations follow a more sustainable path.

The trend towards urbanization may help as well, experts note, since cities allow for economies of scale and more efficient service provision. Densely populated places consume fewer resources per capita than sparsely populated ones thanks to economies in such areas as water delivery, housing, waste management and recycling, energy use and transportation, they say.

"Decoupling makes sense on all the economic, social and environmental dials," says UN Under Secretary-General Achim Steiner, UNEP's Executive Director.