$(i)$ Distinguish between renewable and non-renewable sources of energy,giving one example of each.
$(ii)$ Why is the use of wood as a fuel not advised,although forests can be replenished?

(N/A) $(i)$ Renewable sources of energy can be replenished naturally over a short period and can be used repeatedly,e.g.,wind energy. On the other hand,non-renewable sources of energy cannot be replenished once consumed and get exhausted over time,e.g.,coal.
$(ii)$ The use of wood as a fuel is not advised because the natural replenishment of forests is an extremely slow process compared to the rate of consumption. Furthermore,wood has a low calorific value,its burning causes significant air pollution,and it produces large amounts of ash,which creates disposal problems.