Describe the Production of Solid Waste in the United States and What Happens to It

Without desperate activeness, population growth and urbanization will outpace waste reduction, warn Daniel Hoornweg, Perinaz Bhada-Tata and Chris Kennedy.

The now-full Jardim Gramacho landfill in Rio de Janeiro, Brazil, received more x,000 tonnes of waste per day. Credit: SERGIO MORAES/REUTERS

Solid waste — the stuff we send down our chutes, discard at work and put on the adjourn every calendar week — is a striking by-product of culture. The average person in the United States throws away their body weight in rubbish every month. When waste direction works well, nosotros give it piddling thought: out of sight and, ordinarily, quickly out of mind. Discarded materials are collected, some are recycled or composted, and nigh are landfilled or incinerated. But the global view is troubling.

In the by century, equally the globe'due south population has grown and become more urban and affluent, waste production has risen tenfold. By 2025 it will double again¹. Rubbish is being generated faster than other environmental pollutants, including greenhouse gases. Plastic clogs the earth'south oceans and rivers, causing flooding in developing-world cities. Solid-waste management is i of the greatest costs to municipal budgets.

The waste problem is acute in emerging cities. Landfills such as Laogang in Shanghai, Mainland china; Sudokwon in Seoul; the now-full Jardim Gramacho in Rio de Janeiro, Brazil; and Bordo Poniente in Mexico Metropolis vie for the championship of the world's largest. Each typically receives more than 10,000 tonnes of waste per 24-hour interval. Rapidly developing cities such as Shenzhen in Red china are adding to the earth's 2,000-plus inventory of waste material incinerators. With the largest able to process more than than 5,000 tonnes per day, concerns over ash disposal, air pollution and costs are rising also.

As city dwellers get richer, the corporeality of waste they produce reaches a limit. Wealthy societies tend to curb their waste. So as living standards around the world rise and urban populations stabilize, global solid-waste generation will peak.

Just when is hard to predict. Simply by extending current socio-economic trends to 2100, nosotros project that 'peak waste matter' volition not occur this century. Unless we reduce population growth and textile consumption rates, the planet will have to behave an increasing waste burden.

Urban problem

Solid waste is mostly an urban phenomenon. In rural communities in that location are fewer packaged products, less food waste matter and less manufacturing. A city resident generates twice as much waste material as their rural counterpart of the same abundance. If we account for the fact that urban citizens are usually richer, they generate four times as much.

Equally urbanization increases, global solid-waste generation is accelerating. In 1900, the world had 220 one thousand thousand urban residents (13% of the population). They produced fewer than 300,000 tonnes of rubbish (such as broken household items, ash, nutrient waste and packaging) per day. Past 2000, the ii.9 billion people living in cities (49% of the globe's population) were creating more 3 million tonnes of solid waste per day. Past 2025 it will be twice that — enough to fill a line of rubbish trucks 5,000 kilometres long every day.

Together, the member countries of the Organisation for Economic Co-operation and Development (OECD) are the largest waste generators, producing around i.75 million tonnes per day. This volume is expected to increase until 2050, owing to urban population growth, then to slowly decline, as advances in material science and applied science make products smaller, lighter and more resource efficient.

Some countries generate more waste matter than others. Japan issues about one-third less rubbish per person than the U.s., despite having roughly the same gross domestic product (GDP) per capita. This is considering of higher-density living, college prices for a larger share of imports and cultural norms. Waste product quantities worldwide tin can also vary seasonally, past upwards to 30%, every bit horticultural and food wastes fluctuate. For example, household waste volumes double in the calendar week after Christmas in Canada.

Waste reduction and dematerialization efforts in OECD countries are countered by trends in due east Asia, particularly in China. China's solid-waste generation is expected to increase from 520,550 tonnes per solar day in 2005 to one.iv million tonnes per day in 2025. East asia is now the globe's fastest growing region for waste, a distinction that is likely to shift to south asia (mainly India) in 2025, and then to sub-Saharan Africa around 2050.

As a country becomes richer, the composition of its waste material changes. With more money comes more packaging, imports, electronic waste and broken toys and appliances. The wealth of a country can readily exist measured, for example, by how many mobile phones it discards. Solid waste product can thus be used every bit a proxy for the ecology impact of urbanization. Most of a material'southward affect is through production and use. Less than 5% stems from waste product management, which includes emissions from drove trucks, landfills and incinerators.

Peak waste product

The charge per unit at which solid-waste generation volition rise depends on expected urban population and living standards growth and human being responses. In 2012, two of us (D.H. and P.B.-T.) authored a World Bank study, What a Waste ¹, which estimated that global solid-waste generation would rise from more than 3.5 meg tonnes per day in 2010 to more 6 million tonnes per day in 2025. These values are relatively robust, because urban populations and per capita Gross domestic product can be well forecast for several decades.

Extending those projections to 2100 for a range of published population and GDP scenarios shows that global 'peak waste product' will not happen this century if current trends continue (see 'When will waste peak?'). Although OECD countries will peak by 2050 and Asia–Pacific countries by 2075, waste will keep to rise in the fast-growing cities of sub-Saharan Africa. The urbanization trajectory of Africa will be the main determinant of the appointment and intensity of global peak waste materialⁱⁱ.

Using 'business organization-as-usual' projections, we predict that, by 2100, solid-waste generation rates will exceed 11 1000000 tonnes per day — more than iii times today's rate. With lower populations, denser, more than resource-efficient cities and less consumption (forth with higher affluence), the peak could come up forward to 2075 and reduce in intensity by more than 25%. This would save around 2.6 one thousand thousand tonnes per day.

Convert and divert

How can today's situation exist improved? Much can exist done locally to reduce waste. Some countries and cities are leading the way. San Francisco in California has a goal of 'zero waste' (100% waste material diversion by reduction and recycling) by 2020; already more than 55% of its waste is recycled or reused. The Japanese metropolis of Kawasaki has improved its industrial processes to divert 565,000 tonnes of potential waste material per year — more than all the municipal waste the city now handles. The exchange and reuse of materials connects steel, cement, chemical and paper firms into an industrial ecosystem³.

" Waste material will keep to ascension in the fast-growing cities of sub-Saharan Africa. "

Due north America and Europe accept tried disposal fees, and establish that every bit fees increment, waste material generation decreases. Some other tactic is to steer people to buy less with their increased wealth, and to spend more on experiential activities that require fewer resources^4,5.

But greater attending to consumption and improvement in waste management is needed in rapidly urbanizing regions in developing countries, especially in Africa. Through increased education, equality and targeted economic development, as in the sustainability scenario we evaluated⁶ (SSP1), the global population could stabilize below 8 billion past 2075, and urban populations soon thereafter. Such a path reflects a movement towards a guild with greater urban density and less overall material consumption^seven. Also needed is a widespread application of 'industrial ecology' — designing industrial and urban systems to conserve materials. This begins with studies⁸ of the urban metabolism — fabric and free energy flows in cities.

Reducing food and horticultural waste is important — these waste material components are expected to remain large. Construction and demolition as well contribute a big fraction by mass to the waste material stream; therefore, building strategies that maximize the utilize of existing materials in new construction would yield significant results.

The planet is already straining from the impacts of today's waste matter, and nosotros are on a path to more triple quantities. Through a move towards stable or declining populations, denser and improve-managed cities consuming fewer resources, and greater equity and use of technology, we tin bring peak waste forward and downward. The ecology, economic and social benefits would be enormous.

References

1. Hoornweg, D. & Bhada-Tata, P. What a Waste material: A Global Review of Solid Waste product Direction (Earth Depository financial institution, 2012).

2. Dyson, B. & Chang, N. Waste Mgmt 25, 669–679 (2005).

   Article  Google Scholar

3. Van Berkel, R., Fujita, T., Hashimoto, South. & Fujii, Grand. Environ. Sci. Technol. 43, 1271–1281 (2009).

   ADS  CAS  Article  Google Scholar

4. Ausubel, J. H. & Waggoner, P. E. Proc. Natl Acad. Sci. USA 105, 12774–12779 (2008).

   ADS  CAS  Article  Google Scholar

5. Eriksson, O. et al. J. Cleaner Prod. xiii, 241–252 (2005).

   Article  Google Scholar

6. Kriegler, E. Glob. Environ. Modify 22, 807–822 (2012).

   Article  Google Scholar

7. International Solid Waste Clan. Globalization and Waste Direction (2012).

8. Kennedy, C. A. & Hoornweg, D. J. Indust. Ecol. 16, 780–782 (2012).

   Commodity  Google Scholar

9. International Constitute for Practical Systems Analysis. SSP Database (2012); available at http://go.nature.com/lwp7x1

Download references

Author information

Affiliations

1. Daniel Hoornweg is acquaintance professor of energy systems at the Academy of Ontario Plant of Technology in Oshawa, Canada.

   Daniel Hoornweg

2. Perinaz Bhada-Tata is a solid-waste product consultant in Dubai, United Arab Emirates.

   Perinaz Bhada-Tata

3. Chris Kennedy is professor of civil engineering at the Academy of Toronto, Canada.

   Chris Kennedy

Respective writer

Correspondence to Daniel Hoornweg.

Related links

Rights and permissions

About this article

Cite this article

Hoornweg, D., Bhada-Tata, P. & Kennedy, C. Environment: Waste production must meridian this century. Nature 502, 615–617 (2013). https://doi.org/10.1038/502615a

Download citation

• Published: 30 Oct 2013

• Issue Date: 31 Oct 2013

• DOI : https://doi.org/ten.1038/502615a

Farther reading

penningtonseneiver.blogspot.com

Source: https://www.nature.com/articles/502615a

Share this post