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my sister told me that rail used to run by coal. what is coal?

Asked by heerpupadhyay4375.2sdatl 22nd April 2020, 6:35 AM
Answered by Expert
  • Coal is a fossil fuel like natural gas and oil.
  • It is a flammable black hard rock used as a solid fossil fuel.
  • The major source of fuel throughout the world is coal.
  • Coal is a black or brown rock which, when burned, releases energy in the form of heat.
  • One of coal’s main uses is the production of electricity. 
  • That is why, it was used to run rails in olden times.
Answered by Expert 22nd April 2020, 10:11 AM
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