The amount of raw materials needed to sustain the economies of developed countries is significantly greater than present indicators suggest, a new Australian study has revealed.
Using a new modelling tool and more comprehensive indicators, researchers were able to map the flow of raw materials across the world economy with unprecedented accuracy to determine the true “material footprint” of 186 countries over a two-decade period (from 1990 to 2008).
The results confirm that pressures on raw materials do not necessarily decline as affluence grows and demonstrates the need for policy-makers to consider new accounting methods that more accurately track resource consumption.
“Humanity is using raw materials at a level never seen before with far-reaching environmental impacts on biodiversity, land use, climate and water,” says lead author Tommy Wiedmann, Associate Professor of Sustainability Research at the UNSW School of Civil and Environmental Engineering. “By relying on current indicators, governments are not able to see the true extent of resource consumption.”
“Now more than ever, developed countries are relying on international trade to acquire their natural resources, but our research shows this dependence far exceeds the actual physical quantity of traded goods,” says Wiedmann, who worked at CSIRO Ecosystem Sciences when the research was undertaken.
The researchers say that because these resources never leave their country of origin, they are not adequately captured by current reporting methods. They have used a new indicator they call the “material footprint” to more accurately account for these ‘lost’ resources and have developed tools that could assist policy-makers in future.
Economy-wide accounting metrics (such as Domestic Material Consumption or DMC) currently used by certain governments and intergovernmental organisations, including the OECD, the European Union and the UN Environment Programme, only account for the volume of raw materials extracted and used domestically, and the volume physically traded.
These indicators suggest resource-use in wealthy nations has increased at a slower rate than economic growth – something known as relative decoupling – and that other countries have actually seen their consumption decrease over the last 20 years – something known as absolute decoupling.
Decoupling of raw material usage from economic growth is considered one of the major goals en route to achieving sustainable development and a low-carbon economy.
This story is reprinted from material from UNSW, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. Link to original source.