science
Grade-4-
Easy

Question

The energy source which causes pollution is ____.

  1. Sunlight    
  2. Petroleum    
  3. Blowing wind    
  4. Falling water    

hintHint:

The energy source which causes pollution is petroleum.

The correct answer is: Petroleum


    •  Fuels like coal and petroleum are fossil fuels. 
    • Fossil fuels are obtained from decomposed organic matter. 
    • When burned, fossil fuel emits carbon dioxide which acts as a green house gas and cause global warming.

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