Reuse and Recycling

• What is the main focus of the study material?

  Reuse and recycling
• Why are materials in the modern world limited?

  Because they are finite resources
• What is better to do with materials once finished?

  Recycle them
• What is the consequence of using new finite resources?

  They will eventually run out
• What does sustainable development take into account?

  The needs of present society
• What should sustainable development avoid damaging?

  The lives of future generations
• Are all resources renewable?

  No, not all resources are renewable
• What happens when resources are used unsustainably?

  They cannot be kept using them
• What is a consequence of extracting resources unsustainably?

  It leads to waste production
• What is the process of turning resources into useful materials?

  Processing resources
• What materials can be processed into useful forms?

  Plastics or fuels
• What is a way to reduce the use of finite resources?

  Use less of them
• What does reducing resource use not only do?

  It doesn't just reduce resource use
• What can chemists develop to help reduce finite resource use?

  Processes that use lower amounts
• What is copper classified as in terms of resource availability?

  Finite resource
• How can copper's sustainability be improved?

  By extracting it from low-grade ores
• What are scientists looking into regarding copper extraction?

  New ways to extract it sustainably
• What is bioliching used for?

  To convert copper compounds
• What are the key points of sustainable development?

  • Accounts for present society's needs
  • Avoids damaging future generations' lives
  • Focuses on using resources responsibly
• What are the implications of using finite resources unsustainably?

  • Resources will eventually run out
  • Increased waste production
  • Damage to the environment
• What are the methods to improve copper sustainability?

  • Extracting from low-grade ores
  • Developing new extraction processes
  • Reducing overall copper consumption
• What type of resource is mentioned in the study material?

  It is an infinite resource.
• How can the sustainability of the resource be improved?

  By extracting it from low-grade ores.
• What are bioleaching bacteria used for?

  To convert copper compounds into soluble copper.
• What does the leachate contain?

  It contains copper ions.
• How can copper be extracted from leachate?

  By using electrolytic methods.
• What is phytoremediation?

  It involves growing plants in copper-rich soil.
• How do plants deal with copper in the soil?

  They gradually build up copper in their leaves.
• What can happen to plants that accumulate copper?

  They can be harvested and burned.
• What does the ash from burned plants contain?

  It contains copper compounds.
• How can copper be extracted from ash?

  By using electrolytic methods.
• What is a disadvantage of traditional copper mining methods?

  They are damaging to the environment.
• What is an advantage of new extraction methods?

  They have a smaller environmental impact.
• What is a disadvantage of new extraction methods?

  They are slower than traditional methods.
• What is the first step in recycling metals?

  Melting the metals.
• Why is recycling metals important?

  It saves energy compared to mining.
• How does recycling metals affect waste management?

  It reduces the amount of waste generated.
• What is the impact of recycling metals on energy consumption?

  It uses less energy than mining new metals.
• How are metals usually recycled?

  By melting and casting them into new shapes.
• What determines the recycling process of metals?

  The type of metal being recycled.