Coal is burned to get energy. By burning coal, green houses gases like carbon dioxide, nitrogen oxides and suphur oxides are produced.
Rest of the energy sources given in the option are clean energies.
Answer is A.
Answer:
The answer is C.
Explanation:
I guessed and it was right
Mass is measured in kg
Velocity is measured in ms^-1
Hope this is what you were looking for
I would choose B. exosphere. Astronomers study outer space, planets and ect.