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A further cause of the unsustainable use of marine resources is pollution. Hazardous substances that are dumped in oceans either accidentally (oil spills) or on purpose, can cause tremendous damage to marine life.
Land degradation: The reduction or loss of the biological or economic productivity from rainfed cropland, irrigated cropland, or range, pasture, forest and woodlands. Land degradation usually results from unsustainable land use.
 See also: Water vapour, Acid, Environmental impact, Emissions, Renewable resources
  
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