The wise and careful use of energy is called CONSERVATION
the number of electrons that fill the outer shell determines the properties of elements
Answer:
active solar heating systems use solar energy to heat a fluid either liquid or air and then transfer the solar heat directly to the interior space or to a storage system for later use. If the solar system cannot provide adequate space heating, an auxiliary or back-up system provides the additional heat.
hope this helps : )
Answer: I would either say wind or sunlight
Explanation:
I don’t think it would be clouds or rain
Hope that helps
