Identify and briefly explain each of the four steps of the waste management hierarchy. Why is source reduction the most preferred waste management strategy?
What will be an ideal response?
1. Source reduction and reuse: generating less waste by either reducing the amount of raw materials required (such as through dematerialization) or reusing scrap material as an input for the same or other production processes. This is the most preferred waste management strategy because it reduces the overall demand for energy and other materials inputs to production. It also creates life cycle gains because it eliminates the energy and processing required in the future for recycling, energy recovery, and ultimate disposal.
2. Recycling: processing of collecting waste, recovering the usable materials in it, and processing those materials for reuse as a feedstock.
3. Energy recovery: harnessing the embodied energy in waste, usually by burning it for steam or electricity.
4. Treatment and disposal: when nothing useful can be further extracted from a waste product, it must be treated for safe disposal and then permanently disposed of. This is the least preferred waste management strategy.
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show that the error resulting when 
is assumed equal to 
evaluated at the arithmetic mean of the, initial and final temperatures is 
What will be an ideal response?
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Fill in the blank(s) with correct word
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