21: Earth's Materials Last updated Save as PDF Page ID6105 Contributed by CK12CK12 21.8: Preventing Hazardous Waste Problems21.1: Materials Humans Use21.2: Renewable vs. Nonrenewable Resources21.3: Ore Deposits21.4: Ore Mines21.5: Ore Extraction21.6: Earth's Materials- Challenge 121.7: Environmental Impacts of Mining21.8: Hazardous Waste21.10: Earth's Materials- Challenge 221.11: Availability of Natural Resources21.12: Natural Resource Conservation21.13: Earth's Materials- Challenge 3