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In sustainability goals, the use of proportion varies depending on the specific goal and its related indicators. For instance, in the Sustainable Development Goals (SDGs) established by the United Nations, some goals have specific targets or indicators that require a certain proportion. For example, SDG 2 aims to end hunger, achieve food security and improved nutrition, and promote sustainable agriculture. One of its targets is to double the agricultural productivity and incomes of small-scale food producers by 2030, which requires a certain proportion of growth in productivity and income. Similarly, SDG 7 aims to ensure access to affordable, reliable, sustainable, and modern energy for all, and includes a target to increase the share of renewable energy in the global energy mix.
In other sustainability goals, the use of proportion may not be as explicit but still plays a role in achieving the overall objective. For example, reducing greenhouse gas emissions to combat climate change may require a certain proportion of energy to come from renewable sources, or a certain proportion of buildings to meet energy-efficient standards.
Overall, the use of proportion in sustainability goals is dependent on the specific objective, its related indicators, and the context in which it is being implemented.
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