U.S., EU responsible for the majority of ecological damage caused by excess use of raw materials, study finds

Human impacts on the Earth's -system processes are exceeding several planetary boundaries, not only in terms of CO? emissions and climate change, but also in land-use change, biodiversity loss, chemical pollution and biogeochemical flows. This ecological collapse is being caused in large part by global resource extraction, which has increased rapidly over the past half century and now dramatically exceeds safe and sustainable levels.

It is estimated that the world economy consumes over 90 billion tonnes of materials per year, well in excess of what industrial ecologists consider to be the sustainable limit.

This new study proposes a novel method with which to determine national responsibility for ecological breakdown. "Not all nations are equally responsible for this trend; some nations use substantially more resources per capita than others through material extraction, production, consumption and waste," explains ICTA-UAB researcher Jason Hickel.

Between 1970 and 2017, nearly 2.5 trillion tonnes of materials were extracted globally, with high-income and upper-middle-income countries using the vast majority of these resources. Of this, 1.1 trillion tonnes were in excess of the sustainable corridor.

The study shows that high-income countries (with 16% of the world's population) are responsible for 74% of global excess resource use over the 1970-2017 period, driven mainly by the United States (27%) and high-income countries in the European Union (25%). Spain ranks 11th in the list of 15 countries exceeding the planetary sustainable limit of raw material use. Spain is responsible for 2% of excess, behind countries such as Japan, Germany, France, the United Kingdom, Canada and Italy, among others.

China, an upper-middle-income country, ranks second globally, and is responsible for 15% of global excess material use. The rest of the Global South (i.e., low-income and middle-income countries of Latin America and the Caribbean, Africa, the Middle East and Asia) is responsible for only 8%. Likewise, 58 countries in the global South, representing 3.6 billion people and including India, remain within sustainable levels.

The research, published in the journal Lancet Planetary Health, analysed domestic extraction as well as the materials involved in global trade flows for resources such as fossil fuels, timber, metals, minerals and biomass, using data from the UN's international resource panel and extrapolated calculations.

National responsibility has changed over the period analysed. Although the United States' overshoot has grown consistently in absolute terms, its share of global overshoot has gradually diminished over the past two decades, a similar trend for Europe and other high-income nations. This change is mainly due to increasing resource use in China, which is mostly composed of construction materials. China's overshoot began only in 2001, but has grown rapidly in the years since.

"The results show that wealthy nations bear the overwhelming responsibility for global ecological breakdown, and therefore owe an ecological debt to the rest of the world," explains Jason Hickel, who stresses that "these nations need to take the lead in making radical reductions in their resource use to avoid further degradation, which will likely require transformative post-growth and degrowth approaches."