Sustainability

Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. Sustainability usually has three dimensions (or pillars): environmental, economic, and social. Many definitions emphasize the environmental dimension. This can include addressing key environmental problems, including climate change and biodiversity loss. The idea of sustainability can guide decisions at the global, national, and individual levels. A related concept is that of sustainable development, and the terms are often used to mean the same thing. UNESCO distinguishes the two like this: "''Sustainability'' is often thought of as a long-term goal (i.e. a more sustainable world), while ''sustainable development'' refers to the many processes and pathways to achieve it."

Details around the economic dimension of sustainability are controversial. Scholars have discussed this under the concept of ''weak and strong sustainability''. For example, there will always be tension between the ideas of "welfare and prosperity for all" and environmental conservation, so trade-offs are necessary. It would be desirable to find ways that separate economic growth from harming the environment. This means using fewer resources per unit of output even while growing the economy. This reduces the environmental impact of economic growth, such as pollution. Doing this is difficult. Some experts say there is no evidence that it is happening at the required scale.

It is challenging to measure sustainability on a metric scale. Indicators look at the environment, society, and the economy. But there is no fixed definition of ''sustainability indicators''. The metrics are evolving and include indicators, benchmarks and audits. They include sustainability standards and certification systems like Fairtrade and Organic. They also involve indices and accounting systems such as corporate sustainability reporting and Triple Bottom Line accounting.

It is necessary to address many barriers to sustainability to achieve a ''sustainability transition''. Some barriers arise from nature and its complexity. Other barriers are ''extrinsic'' to the concept of sustainability. For example they can result from the dominant institutional frameworks in countries.

Global issues of sustainability are difficult to tackle as they need global solutions. Existing global organizations such as the UN and WTO are inefficient in enforcing current global regulations. One reason for this is the lack of suitable sanctioning mechanisms. Governments are not the only sources of action for sustainability. For example, business groups have tried to integrate ecological concerns with economic activity. Religious leaders have stressed the need for caring for nature and environmental stability. Individuals can also live in a more sustainable way.

People have criticized the idea of sustainability. One point of criticism is that the concept is vague and only a buzzword. Another is that sustainability might be an impossible goal. Some experts have pointed out that "no country is delivering what its citizens need without transgressing the biophysical planetary boundaries".

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