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A hierarchical query is a type of SQL query that handles hierarchical model data. They are special cases of more general recursive fixpoint queries, which compute transitive closures . In standard SQL:1999 hierarchical queries are implemented by way of recursive common table expressions (CTEs).
Waste hierarchy. Refusing, reducing, reusing, recycling and composting allow to reduce waste. Waste minimisation is a set of processes and practices intended to reduce the amount of waste produced. By reducing or eliminating the generation of harmful and persistent wastes, waste minimisation supports efforts to promote a more sustainable ...
The waste management hierarchy indicates an order of preference for action to reduce and manage waste, and is usually presented diagrammatically in the form of a pyramid. [3] The hierarchy captures the progression of a material or product through successive stages of waste management , and represents the latter part of the life-cycle for each ...
Zero waste, or waste minimization, is a set of principles focused on waste prevention that encourages redesigning resource life cycles so that all products are repurposed (i.e. "up-cycled") and/or reused. The goal of the movement is to avoid sending trash to landfills, incinerators, oceans, or any other part of the environment.
The waste hierarchy is the bedrock of most waste minimization strategies. The aim of the waste hierarchy is to extract the maximum practical benefits from products and to generate the minimum amount of end waste; see: resource recovery. [16] [17] The waste hierarchy is represented as a pyramid because the basic premise is that policies should ...
Resource efficiency is the maximising of the supply of money, materials, staff, and other assets that can be drawn on by a person or organization in order to function effectively, with minimum wasted resource expenses.
This includes the minimization of waste and hazardous by-products, air pollution, energy expenditure and other factors. Design for environmental packaging : Materials used in packaging are environmentally responsible, which can be achieved through the reuse of shipping products, elimination of unnecessary paper and packaging products, efficient ...
Waste is considered a resource in itself, closing the loop of resource production. [7] Recycled resources require less labor and energy to convert into new products, which reduces environmental pollution and production costs. Therefore, closed-loop recycling may be considered part of environmental sustainability programs. [8]