If we use …………….. Bottom vessels fuel will be wasted.

What do fossil fuels provide us?

Why should we use fossil fuels only when absoultely necessary?

Why do we use fossil fuels judiciously ?

What is the use of animal wastes ?

If we utilize the fuel at the same rate which we are utilizing now, we never get fuel for our vehicles in the nearest future. So in order to conserve the fuel you should not do this.