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What is global warming?

  1. The concentration of oxygen is increasing in air is causing global warming
  2. It is caused due to soil erosion
  3. The amount of heat increasing in environment due to increased concentration of carbon dioxide
  4. All of the above

Answer: The amount of heat increasing in environment due to increased concentration of carbon dioxide

Long Answer:

The amount of heat increasing in environment due to increased concentration of carbon dioxide is called global warming.

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