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Overconsumption is a situation where resource use has outpaced the sustainable capacity of the ecosystem. A prolonged pattern of overconsumption leads to environmental degradation and the eventual loss of resource bases.
Generally, the discussion of overconsumption parallels that of human overpopulation; that is the more people, the more consumption of raw materials takes place to sustain their lives. But, humanity's overall impact on the planet is affected by many factors besides the raw number of people. Their lifestyle (including overall affluence and resource utilization) and the pollution they generate (including carbon footprint) are equally important. Currently, the inhabitants of the developed nations of the world consume resources at a rate almost 32 times greater than those of the developing world, who make up the majority of the human population (7.4 billion people).
However, the developing world is a growing market of consumption. These nations are quickly gaining more purchasing power and it is expected that the Global South, which includes cities in Asia, Latin America and Africa, will account for 56% of consumption growth by 2030. This means that consumption rates will plateau for the developed nations and shift more into these developing countries.
The theory of overpopulation reflects issues of carrying capacity without taking into account per capita consumption, by which developing nations are evaluated to consume more than their land can support. The United Nations estimate that world population will reach 9.8 billion in the year 2050 and 11.2 in 2100. This growth will be highly concentrated in the developing nations which also poses issues with inequality of consumption. The nations that will come into consumer dominance must abstain from abusing certain forms of consumption, especially energy consumption of CO2. Green parties and the ecology movement often argue that consumption per person, or ecological footprint, is typically lower in poorer than in richer nations.
In understanding the effects of over-consumption, it is pertinent to understand what causes the phenomenon. There is a spectrum of goods and services that the world population constantly consume. These range from food and beverage, clothing and footwear, housing, energy, technology, transportation, education, health and personal care, financial services and other utilities. Each of these require a different resource and once that resource is exploited to a certain point, that qualifies as over consumption. Since the developing nations are rising quickly into the consumer class, it is important to note the trends happening in these nations. According to the World Bank, the highest shares of consumption lie in food and beverage and clothing and footwear. This applies regardless of sector of income.
Two main factors of why people buy so much and so often is due to planned and perceived obsolescence. This factor of production was introduced first in the United States and it revolves around the design of products. With these methods, the products are intentionally designed to be discarded after a short amount of time. As of 2012, only 1% of goods purchased were still in use after 6 months. When it is planned, designers create products that will not be able to work after a certain amount of time but they work for enough time to ensure the customers will come back to buy again. Perceived obsolescence comes in a lot with fashion and trends and fueled by advertising and media consumption. Through this technique, consumers are convinced that certain products do not have value anymore because it is out of style, and in order to have value, consumers must buy more up to date styles. As of 2015, the top five consumer markets in the world included the United States, Japan, Germany, China and France.
A fundamental effect of overconsumption is a reduction in the planet's carrying capacity. Excessive unsustainable consumption will exceed the long term carrying capacity of its environment (ecological overshoot) and subsequent resource depletion, environmental degradation and reduced ecosystem health.
Looking at the two largest sectors of over consumption, the fashion and food industries, we can see most of the harmful effects on the Earth starting here. The fashion industry has created a new venue, fast fashion, which in 2013 produced 15.1 million tons of textile waste and of that, 12.8 million tons were thrown out. The United States, being the largest consumer market, deals with excess clothing by exporting it to poorer, developing nations but this solution is not sustainable because the demand will go down as cheap clothing becomes more readily available. Another way of disposal is to throw out into landfills or burn up in incinerators which is the least sustainable disposal solution.
The food industry is the other largest sector of consumption and studies show that people waste a fifth of food products just through disposal or overconsumption. The UN Food and Agriculture Organization collected data and found that by the time food reaches the consumer, 9% (160 million tons) goes uneaten and 10% is lost to overconsumption - meaning consumers ate more than the calorie intake requirement. Other aspects of losses surrounding dry matter came at each stage in the food system, the highest amount being from livestock production at 43.9%, transportation accounted for 18% and consumer waste accounting for 12.2% loss. When the consumer takes in too much, this not only explains losses in the beginning of the stage at production (and over production) but also lends itself to overconsumption of energy and protein, having harmful effects on the body.
The scale of modern life's overconsumption has enabled an overclass to exist, displaying affluenza and obesity. However once again both of these claims are controversial with the latter being correlated to other factors more so than over-consumption. Within the topic of overconsumption there are many other ideas that should be considered in order to find the true cause of it. Some important events that coincide are poverty, population and the development of an area. Overconsumption can also lead to a decline in the economy and financial instability.
In the long term, these effects can lead to increased conflict over dwindling resources  and in the worst case a Malthusian catastrophe. Lester Brown of the Earth Policy Institute, has said: "It would take 1.5 Earths to sustain our present level of consumption. Environmentally, the world is in an overshoot mode."
As of 2012, the United States alone was using 30% of the world’s resources and if everyone were to consume at that rate, we would need 3-5 planets to sustain this type of living. Resources are quickly becoming depleted, with about ⅓ already gone. With new consumer markets rising in the developing countries which account for a much higher percent of the world’s population, this number can only rise.
The Worldwatch Institute said China and India, with their booming economies, along with the United States, are the three planetary forces that are shaping the global biosphere. The State of the World 2005 report said the two countries' high economic growth exposed the reality of severe pollution. The report states that
The world's ecological capacity is simply insufficient to satisfy the ambitions of China, India, Japan, Europe and the United States as well as the aspirations of the rest of the world in a sustainable way.
The idea of overconsumption is also strongly tied to the idea of an ecological footprint. The term “ecological footprint” refers to the “resource accounting framework for measuring human demand on the biosphere.” Currently, China is roughly 11 times lower in per capita footprint, yet has a population that is more than four times the size of the USA. It is estimated that if China developed to the level of the United States that world consumption rates would roughly double. According to Scientific American, one person from China uses 53 times fewer resources than the average American.
A 2018 study published in Science postulates that meat consumption is set to increase as the result of human population growth and rising affluence, which will increase greenhouse gas emissions and further reduce biodiversity. Meat consumption needs to be reduced by up to 90% according to a 2018 study.
The most obvious solution to the issue of overconsumption is to simply slow the rate at which materials are becoming depleted. Less consumption naturally has negative effects on economies - so instead, countries must look to curb consumption rates while allowing for new industries, such as renewable energy and recycling technologies, to flourish and deflect some of the economic burden. A fundamental shift in the global economy may be necessary in order to account for the current change that is taking place or that will need to take place. Movements and lifestyle choices related to stopping overconsumption include: anti-consumerism, freeganism, green economics, ecological economics, degrowth, frugality, downshifting, simple living, minimalism, and thrifting.
Recent grassroots movements have been coming up with creative ways to decrease the amount of goods we consume. The Freecycle Network is a network of people in one's community that are willing to trade goods for other goods or services. It is a new take on thrifting while still being beneficial to both parties.
Other researchers and movements such as the Zeitgeist Movement suggest a new socioeconomic model which, through a structural increase of efficiency, collaboration and locality in production as well as effective sharing, increased modularity, sustainability and optimal design of products, are expected to reduce resource-consumption. Solutions offered include consumers using market forces to influence businesses towards more sustainable manufacturing and products.
Other ways to reduce consumption is to slow population growth by improving family planning services worldwide. In developing countries more than 200 million women do not have adequate access. Women's empowerment in these countries will also result in smaller families.
- Artificial demand
- Collaborative consumption
- Conspicuous consumption
- Consumption (economics)
- Environmental studies
- Overshoot (population)
- Peak copper
- Peak oil
- Preorder economy
- Santosha (renunciation of the need to acquire)
- Steady-state economy
- Surplus: Terrorized into Being Consumers (film)
- World Scientists' Warning to Humanity
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Much less frequently mentioned are, however, the ultimate drivers of those immediate causes of biotic destruction, namely, human overpopulation and continued population growth, and overconsumption, especially by the rich. These drivers, all of which trace to the fiction that perpetual growth can occur on a finite planet, are themselves increasing rapidly.
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