Answer:
Explanation:
Solar cell, Although there are many types of energy, the most efficient forms are renewable: hydro-thermal, tidal, wind, and solar. Solar energy has been proven to be the most efficient and effective among renewable energy sources for home and commercial use.
When it comes to surviving in the wild, campers and hikers also often depend on some sort of portable backup power source. Solar energy is one of the best backup power sources for emergency situations.
Human powered generators are the best energy source for the rescue team as it doesn't require any lengthy time consuming resource but only the power of single human being. Just like fossil fuels, the human power is a kind of renewable energy source that does no harm to the environment and can be used whenever required.
