CML5

Cultural sustainability[edit]
Further information: Cultural sustainability
Some scholars have argued for a fourth dimension. They say the traditional three dimensions do not reflect the complexity of contemporary society.
[69]
For example, Agenda 21 for culture and the United Cities and Local Governments argue that sustainable development should include a solid cultural
policy. They also advocate for a cultural dimension in all public policies. Another example was the Circles of Sustainability approach, which
included cultural sustainability.[70]
Interactions between dimensions[edit]

Environmental and economic dimensions[edit]
Further information: Weak and strong sustainability
See also: Sustainable city
People often debate the relationship between the environmental and economic dimensions of sustainability.[71] In academia, this is discussed under the
term weak and strong sustainability. In that model, the weak sustainability concept states that capital made by humans could replace most of
the natural capital.[72][71] Natural capital is a way of describing environmental resources. People may refer to it as nature. An example for this is the use
of environmental technologies to reduce pollution.[73]
The opposite concept in that model is strong sustainability. This assumes that nature provides functions that technology cannot replace.[74] Thus, strong
sustainability acknowledges the need to preserve ecological integrity.[5]: 19 The loss of those functions makes it impossible to recover or repair many
resources and ecosystem services. Biodiversity, along with pollination and fertile soils, are examples. Others are clean air, clean water, and regulation
of climate systems.
Weak sustainability has come under criticism. It may be popular with governments and business but does not ensure the preservation of the earth's
ecological integrity.[75] This is why the environmental dimension is so important.[4]
The World Economic Forum illustrated this in 2020. It found that $44 trillion of economic value generation depends on nature. This value, more than
half of the world's GDP, is thus vulnerable to nature loss.[76]: 8 Three large economic sectors are highly dependent on nature: construction, agriculture,
and food and beverages. Nature loss results from many factors. They include land use change, sea use change and climate change. Other examples
are natural resource use, pollution, and invasive alien species.[76]: 11
Trade-offs[edit]
Trade-offs between different dimensions of sustainability are a common topic for debate. Balancing the environmental, social, and economic
dimensions of sustainability is difficult. This is because there is often disagreement about the relative importance of each. To resolve this, there is a
need to integrate, balance, and reconcile the dimensions.[1] For example, humans can choose to make ecological integrity a priority or to compromise it.
[4]
Some even argue the Sustainable Development Goals are unrealistic. Their aim of universal human well-being conflicts with the physical limits of Earth
and its ecosystems.[20]: 41
Measurement tools[edit]
Further information: Sustainability metrics and indices
Urban sustainability analysis of the greater urban area of the city

of São Paulo using the 'Circles of Sustainability' method of the UN and Metropolis Association. [77]
This section is an excerpt from Sustainability measurement.[edit]

Sustainability measurement is a set of frameworks or indicators used to measure how sustainable something is. This includes processes, products,
services and businesses. Sustainability is difficult to quantify.[78] It may even be impossible to measure as there is no fixed definition.[79] To measure
sustainability, frameworks and indicators consider environmental, social and economic domains. The metrics vary by use case and are still evolving.
They include indicators, benchmarks and audits. They include sustainability standards and certification systems like Fairtrade and Organic. They also
involve indices and accounting. They can include assessment, appraisal[80] and other reporting systems. The metrics are used over a wide range of
spatial and temporal scales.[81][79] For organizations, sustainability measures include corporate sustainability reporting and Triple Bottom Line accounting.
[78]
For countries, they include estimates of the quality of sustainability governance or quality of life measures, or environmental assessments like
the Environmental Sustainability Index and Environmental Performance Index. Some methods let us track sustainable development.[82][83] These include
the UN Human Development Index and ecological footprints.
Environmental impacts of humans[edit]

Further information: Planetary boundaries and Ecological footprint
External videos
Our Planet - Documentary series highlighting impacts people have had on the environment.
(Netflix, Open Access)
There are several methods to measure or describe human impacts on Earth. They include the ecological footprint, ecological debt, carrying capacity,
and sustainable yield. The idea of planetary boundaries is that there are limits to the carrying capacity of the Earth. It is important not to cross these
thresholds to prevent irreversible harm to the Earth.[14][84] These planetary boundaries involve several environmental issues. These include climate
change and biodiversity loss. They also include types of pollution. These are biogeochemical (nitrogen and phosphorus), ocean acidification, land
use, freshwater, ozone depletion, atmospheric aerosols, and chemical pollution.[14][85] (Since 2015 some experts refer to biodiversity loss as change in
biosphere integrity. They refer to chemical pollution as introduction of novel entities.)
The IPAT formula measures the environmental impact of humans. It emerged in the 1970s. It states this impact is proportional to human population,
affluence and technology.[86] This implies various ways to increase environmental sustainability. One would be human population control. Another would
be to reduce consumption and affluence[87] such as energy consumption. Another would be to develop innovative or green technologies such
as renewable energy. In other words, there are two broad aims. The first would be to have fewer consumers. The second would be to have less
environmental footprint per consumer.
The Millennium Ecosystem Assessment from 2005 measured 24 ecosystem services. It concluded that only four have improved over the last 50 years.
It found 15 are in serious decline and five are in a precarious condition.[88]: 6–19
Economic costs[edit]
The doughnut model, with indicators to what extent the ecological

ceilings are overshot and social foundations are not met yet
Experts in environmental economics have calculated the cost of using public natural resources. One project calculated the damage to ecosystems and
biodiversity loss. This was the Economics of Ecosystems and Biodiversity project from 2007 to 2011.[89]
An entity that creates environmental and social costs often does not pay for them. The market price also does not reflect those costs. In the end,
government policy is usually required to resolve this problem.[90]
Decision-making can take future costs and benefits into account. The tool for this is the social discount rate. The bigger the concern for future
generations, the lower the social discount rate should be.[91] Another approach is to put an economic value on ecosystem services. This allows us to
assess environmental damage against perceived short-term welfare benefits. One calculation is that, "for every dollar spent on ecosystem restoration,
between three and 75 dollars of economic benefits from ecosystem goods and services can be expected".[92]
In recent years, economist Kate Raworth has developed the concept of doughnut economics. This aims to integrate social and environmental
sustainability into economic thinking. The so

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Cultural sustainability[edit]

Further information: Cultural sustainability

Interactions between dimensions[edit]

See also: Sustainable city

Urban sustainability analysis of the greater urban area of the city

This section is an excerpt from Sustainability measurement.[edit]

Environmental impacts of humans[edit]

(Netflix, Open Access)

The doughnut model, with indicators to what extent the ecological

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