Answers created by Mic

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• Question #b6cf2
  
• What are sources of arsenic in groundwater?
  
• Question #b0538
  
• How did scientists determine there was a hole in the ozone layer?
  
• What are the similarities and differences between the carbon cycle and nitrogen cycle?
  
• How is human population growth related to environmental sustainability?
  
• What causes lake effect snow?
  
• What are the positive and negative effects of the ozone layer?
  
• Why does weather move from the west to the east?
  
• Why do countries experience overpopulation?
  
• Question #78d48
  
• Why is there usually volcanic activity when the two plates move at a convergent boundary?
  
• What causes the "heat island" effect?
  
• Question #40e9e
  
• How do scientists study climate change?