Bitumen is used for surfacing of roads.
The amount of fossil fuels available in nature is limited. The formation of fossil fuels takes millions of years. Fossil fuels are made by the action of heat and pressure on the remains of dead vegetation and animals. The rate at which we are using them is very fast as compared to their rate of formation. Therefore, fossil fuels are exhaustible natural resources.
S.No. | Year | Shortage (%) |
1 | 1991 | 7.9 |
2 | 1992 | 7.8 |
3 | 1993 | 8.3 |
4 | 1994 | 7.4 |
5 | 1995 | 7.1 |
6 | 1996 | 9.2 |
7 | 1997 | 11.5 |
Coke is a black porous substance. It is obtained as residue during destructive distillation of coal. The characteristics of coke are as follows:
Uses of coke are as follows:
The advantages of using LPG as a fuel are as follows:
The advantages of using CNG as a fuel are as follows:
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