What do you suggest to overcome the problem of "limitation of sources of energy"? Mention any three suggestions for the effective use of energy.

(N/A) To overcome the problem of "limitation of sources of energy", we should prefer the use of alternative or non-conventional sources of energy such as solar energy, tidal energy, and wave energy.
$(b)$ Suggestions for the effective use of energy:
$1$. Switch off lights, fans, and other electrical appliances when not in use.
$2$. Use public transport or car-pooling to reduce fuel consumption.
$3$. Use energy-efficient appliances like $LED$ bulbs and $5$-star rated electrical devices.