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  2. Water, energy and food security nexus - Wikipedia

    en.wikipedia.org/wiki/Water,_energy_and_food...

    The water, energy and food security nexus according to the Food And Agriculture Organisation of the United Nations (FAO), means that water security, energy security and food security are very much linked to one another, meaning that the actions in any one particular area often can have effects in one or both of the other areas. [1]

  3. Green chemistry metrics - Wikipedia

    en.wikipedia.org/wiki/Green_chemistry_metrics

    In the above example, the sum of molecular masses of A, B, C and D should be equal to that of R, X, Y and Z. As only R is the useful product, the atoms of X, Y and Z are said to be wasted as by-products. Economic and environmental costs of disposal of these waste make a reaction with low atom economy to be "less green".

  4. Material flow analysis - Wikipedia

    en.wikipedia.org/wiki/Material_flow_analysis

    An MFA system is a model of an industrial plant, an industrial sector or a region of concern. The level of detail of the system model is chosen to fit the purpose of the study. An MFA system always consists of the system boundary, one or more processes, material flows between processes, and stocks of materials within processes. Physical ...

  5. Zero waste agriculture - Wikipedia

    en.wikipedia.org/wiki/Zero_waste_agriculture

    Zero waste agriculture is a type of sustainable agriculture which optimizes use of the five natural kingdoms, i.e. plants, animals, bacteria, fungi and algae, to produce biodiverse-food, energy and nutrients in a synergistic integrated cycle of profit making processes where the waste of each process becomes the feedstock for another process.

  6. Activated sludge model - Wikipedia

    en.wikipedia.org/wiki/Activated_sludge_model

    Activated sludge model is a generic name for a group of mathematical methods to model activated sludge systems. The research in this area is coordinated by a task group of the International Water Association (IWA). Activated sludge models are used in scientific research to study biological processes in hypothetical systems.

  7. Sustainable food system - Wikipedia

    en.wikipedia.org/wiki/Sustainable_food_system

    The global blue water footprint of food waste is 250 km 3, the amount of water that flows annually through the Volga or three times Lake Geneva. [198] There are several factors that explain how food waste has increased globally in food systems. The main factor is population, because as population increases more food is being made, but most food ...

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  9. Waste input-output model - Wikipedia

    en.wikipedia.org/wiki/Waste_Input-Output_Model

    A model in which represents the generation of waste per unit of output is known as a Waste Extended IO (WEIO) model. [1] In this model, waste generation is included as a satellite account. However, this formulation, while well-suited for handling emissions or resource use, encounters challenges when dealing with waste.