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Precycling

Precycling is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Precycling rather than just read about it. In short: Precycling is the practice of reducing waste by attempting to avoid buying items which will generate waste into households or businesses. The U.S.

Key takeaways

  • Precycling belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Precycling to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Precycling from memory before moving on to harder problems.

Reference excerpt

Precycling is the practice of reducing waste by attempting to avoid buying items which will generate waste into households or businesses. The U.S. Environmental Protection Agency (EPA) states that precycling is the preferred method of integrated solid waste management because it cuts waste at its source and therefore eliminates trash before it is created. According to the EPA, precycling is also characterized as a decision-making process for the consumer because it involves making informed judgments regarding a product's waste implications. The factors taken into consideration by the consumer include whether a product is reusable, durable, or repairable; made from renewable or non-renewable resources; overpackaged; and whether or not the container is reusable.

About Precycling has the ability to build industrial, social, environmental, and economic circumstances that allow for old products to be converted into new resources

Industrial: increasing the independence from accumulative substances, such as heavy metals, fossil fuels, synthetics, etc. Economic: create a circular economy Ecological/environmental: allowance for more extensive and diverse natural habitats where the resources are returned to nature Societal: extend the capacity of precycling to meet everyone's needs The concept of ‘precycling’ was coined in 1988 by social marketing executive Maureen O’Rorke in a public waste education campaign for the City of Berkeley. The application of precycling is not limited to large corporations, but can be administered on smaller scales in local communities. The reason precycling is effective on large scales and on small scales stems from the idea that it shares a common language between experts and non-experts, buyers and sellers, economists and environmentalists. However, it is important to consider that waste prevention systems, such as precycling, require the collaborative effort from several working parts. These parts include prevention targets, producer responsibility, householder charging, funding for pilot projects, public involvement, engagement of private and third sectors, and public campaigns that spread awareness.

Integration of waste management The original three-pronged push for waste management is "Reduce, Reuse, Recycle." Precycling emphasizes "reducing and reusing", while harnessing and questioning the momentum and popularity of the term "recycle." In addition to this strategy, precycling incorporates four supplementary R's: Repair, Recondition, Remanufacture and Refuse. Waste is a resource that can be reused, recycled, recovered, or treated. Precycling differs from other singular forms of waste prevention because it encompasses not one behavior, but many.

Reduce Reduce is a form of precycling that allows for the preservation of natural resources and also saves money on behalf of the manufacturer, the consumer, and the waste manager. Moreover, effective source reduction slows the depletion of environmental resources, prolongs the life of waste management facilities, and makes combustion and landfills safer by removing toxic waste components.

Reuse Reuse is a form of precycling that reinvents items after their initial life and avoids creating additional waste.

Recycle Although precycling harnesses the familiarity of the term recycling, it is still important to note the difference between recycling and prevention. Since precycling focuses on the prevention of waste production, this entails that measures are taken before a substance, material, or product has become waste. Whereas recycling is a type of precycling that involves taking action before existing waste is abandoned to nature. Recycling is a process where discarded materials are collected, sorted, processed, and used in the production of new products. Every time a person engages in the act of recycling, they help increase the market and bring the cost down. However, current research from the American Plastics Council states that only 25% of the nation's recycling capabilities are being utilized. Traditionally recycling requires large amounts of energy to "melt down" and then re-manufacture items. While this may cut down on the amount of trash that is going into landfills, it is not sustainable unless the underlying energy supply is sustainable. In addition, recycling often means downcycling and always involves at least some loss of the original material, so primary extraction is still required to make up the difference. Precycling reduces these problems by using less material in the first place, so less has to be recycled.

Repairing Repair is a type of precycling that corrects specified faults in a product, however the quality of a repaired product is inferior to reconditioned or remanufactured items. One survey found that 68% of the respondents believed repairing was not cost efficient and sought alternative methods such as reconditioning or remanufacturing.

Reconditioning Reconditioning is a type of precycling that requires the rebuilding of major components to restore a product's working condition, which is expected to be inferior to the original product.

Remanufacturing Remanufacturing is another type of precycling that involves the greatest degree of work content, which results in superior quality of the product. In order to remanufacture a product, it requires a total dismantling of the product and the subsequent restoration and replacement of its parts. Remanufacturing is a preferred method of waste reduction compared to repairing and reconditioning because it preserves the embodied energy that has been used to shape the components of a product for their first life and it only requires 20-25% of the initial energy used in formation.

Refuse Refusal to buy certain products due to detrimental impacts on the environment or wasteful packaging is another type of precycling because the rejection of such items paves the way for products that can be reduced, reused, or recycled.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Precycling

Start with the simplest possible case. Write down what Precycling claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Precycling before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Precycling ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Precycling

In research
Precycling appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Precycling in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Precycling is common in secondary-school and first-year university syllabi. It links to neighbouring topics Recycling, Waste management concepts, Waste minimisation, so understanding it makes those chapters shorter.
In everyday life
Look for Precycling outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Precycling in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Precycling means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Precycling out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Precycling in simple terms?

Precycling is the practice of reducing waste by attempting to avoid buying items which will generate waste into households or businesses. The U.S.

Why does Precycling matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Precycling?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Precycling.

Tags

  • Recycling
  • Waste management concepts
  • Waste minimisation

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