Cradle to Cradle Chp 4 summary – Sustainable Systems

1. Please define in your own words the terms biological nutrients,  technical nutrients, monstrous hybrids. 

Biological nutrients: Nutrients that can be used more than once. (cradle-to-cradle)

Technical nutrients: Nutrients that can only be used once, and dispatched after that. (cradle-to-grave)

Monstrous hybrids: A mix of biological and technical nutrients difficult to separate, making it useless for re-use or re-cycling purposes. (cradle-to-grave)

2. What are some examples of unmarketable materials? 

Polyethylene terephthalate (PET) and nuclear waste.

3. What is the main difference between Cradle-to-Grave and Cradle-to-Cradle life cycles? 

Cradle-to-grave is when the materials used for a certain purpose have to be thrown away and not recycle or reuse them. Cradle-to-cradle is the opposite, you can use certain material or product again for another purpose.

4. Please include image examples of biological nutrients, technical nutrients, monstrous hybrids, unmarketable materials. Use examples not included in the reading. 

Biological nutrient – Avocados (the seed)

Uses:

  • Make dye. Use both the skins and the pit to create a natural pink-hued dye for fabric.
  • Make tea
  • Grow an avocado plant
  • Facial masks

 

Technical nutrient – Diamonds

Uses:

  • Diamonds are used in polishing, cutting and drilling.

 

Monstrous hybrids – Batteries

Commercially available batteries use a variety of metals and electrolytes. Anodes can be made of zinc, aluminum, lithium, cadmium, iron, metallic lead, lanthanide, or graphite.

 

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