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Answer:
A system that uses the sun's energy without requiring mechanical devices (pumps or fans) to distribute the collected heat are called solar system while radiator system uses fuel to heat the water. in active solar heating system, the SUN's energy used to heat water.
Answer:
Explanation: reduces green house effect.
<span> Organism- an individual form of life that is capable of growing metabolizing nutrients, and usually reproducing. </span>regardless of the organism being unicellular or multicellular.