Biofuels are fuels made from plant materials. These include biodiesel, which is made from plant oils, and bioethanol, which is made by fermenting sugar and wheat.
Materials that have been previously used. This includes: materials in products that have been reused, refurbished or repaired; components that have been remanufactured; and materials that have been recycled. Non-virgin materials are also referred to as secondary...
Materials that are continually replenished at a rate equal to or greater than the rate of depletion. Examples include: cotton, hemp, maize, wood, wool, leather, agricultural by-products, nitrogen, carbon dioxide, and sea salt. To fit in a circular economy such...
Materials that are continually replenished at a rate equal to or greater than the rate of depletion. Examples include: cotton, hemp, maize, wood, wool, leather, agricultural by-products, nitrogen, carbon dioxide, and sea salt. To fit in a circular economy such...
Materials that are non-renewable. Examples include: metals and minerals fossil forms of carbon such as oil, coal, and natural gas; and sand, rocks and stones.
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