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  2. Recycling by material - Wikipedia

    en.wikipedia.org/wiki/Recycling_by_material

    Recycling can be carried out on various raw materials. Recycling is an important part of creating more sustainable economies , reducing the cost and environmental impact of raw materials. Not all materials are easily recycled, and processing recyclable into the correct waste stream requires considerable energy.

  3. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  4. Homework - Wikipedia

    en.wikipedia.org/wiki/Homework

    However, school teachers commonly assign less homework to the students who need it most, and more homework to the students who are performing well. [9] In past centuries, homework was a cause of academic failure: when school attendance was optional, students would drop out of school entirely if they were unable to keep up with the homework ...

  5. Reuse - Wikipedia

    en.wikipedia.org/wiki/Reuse

    One way to address this is to increase product longevity; either by extending a product's first life or addressing issues of repair, reuse and recycling. [2] Reusing products, and therefore extending the use of that item beyond the point where it is discarded by its first user is preferable to recycling or disposal, [3] as this is the least energy intensive solution, although it is often ...

  6. Upcycling - Wikipedia

    en.wikipedia.org/wiki/Upcycling

    Venice Biennale installation by Małgorzata Mirga-Tas (2022) - artistic upcycling of old textile materials. While recycling usually means the materials are remade into their original form, e.g., recycling plastic bottles into plastic polymers, which then produce plastic bottles through the manufacturing process, upcycling adds more value to the materials, as the name suggested.

  7. Cradle to Cradle: Remaking the Way We Make Things - Wikipedia

    en.wikipedia.org/wiki/Cradle_to_Cradle:_Remaking...

    The pages are not paper, but rather synthetics created from plastic resins and inorganic fillers. The books are more durable and strong than traditional paper books, waterproof, and upcyclable. [5] It is considered a "technical nutrient" in the lifecycle development system. [4] The book has been translated into 12 languages.

  8. Recycling by product - Wikipedia

    en.wikipedia.org/wiki/Recycling_by_product

    Progress in recycling has resulted in a major reduction in dumping. Tire recycling, or rubber recycling, is the process of recycling waste tires that are no longer suitable for use on vehicles due to wear or irreparable damage. These tires are a challenging source of waste, due to the large volume produced, the durability of the tires, and the ...

  9. Environmental groups and resources serving K–12 schools

    en.wikipedia.org/wiki/Environmental_groups_and...

    The Natural Resources Defense Council Green Squad [21] teaches kids about the relationship between their schools and environmental and health issues. The site is designed primarily for students in fifth through eighth grade, but also offers information for younger and older students as well as parents and teachers.

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