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Three big ones are:

  • Global climate change
  • Plastic, chemical, sewage and other pollution in oceans and fresh water
  • Depletion of fish stocks and forests by unsustainable use
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Angela Veum

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2y ago
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Wiki User

12y ago

there are a great many ways but they include: pollution, destruction of natural habitats e.g. deforestation, and thirdly by unprotected sex

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Q: What are three ways humans affect earth's system?
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