waste management

12345678
Across
  1. 4. the process turns organic waste into nutrient-rich soil Composting
  2. 6. facility where waste is buried in the ground Landfill
  3. 7. material is commonly recycled and made from sand Glass
  4. 8. substance discarded after primary use, or is worthless, defective and of no use
Down
  1. 1. approach aims to eliminate all waste, making everything reusable
  2. 2. Turning waste materials into new products of higher quality or value Upcycling
  3. 3. symbol with three chasing arrows, representing recycling Mobius
  4. 5. This gas, often associated with landfills, contributes to the greenhouse effect (7 letters)