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Which of the following is not a fossil sources of energy?
It is the excretion of a cow and not the remains of dead and decaying plants and animals.
The main constituent of petroleum gas is:
The natural gas consist mainly of:
Which of the following is not produced by the burning of fossils fuels?
The product of petroleum used to drive heavy vehicles like truck is:
The aviation fuel which is used in the engines of jet aeroplanes is:
The ultimate sources of energy stored in fossil fuels is:
The fuel which is not used at thermal power plants is:
LPG consists mainly of:
Coke is more valuable when used
Coal is more valuable when used:
One of the following does not contribute to acid rain. That is: