$A$ group of farmers teamed together to set-up a biogas plant close to their farms. List any six advantages that they would be able to derive from the plant.

(N/A) $(i)$ Efficient waste disposal from farms.
$(ii)$ Proper management and disposal of animal excreta.
$(iii)$ Production of biogas which can be used as a clean fuel in chulhas for cooking.
$(iv)$ The spent slurry acts as a nutrient-rich manure for the farms.
$(v)$ Biogas can be used for lighting in homes.
$(vi)$ It is an economical and sustainable source of energy.