The most common component of sand is silicon dioxide in the form of quartz. Simple version just broken down rocks and minerals.
Answer:
Because it helps the filament from decaying
<span>Radioactive waste, as its name implies, is a source of radiation that can be harmful to living organisms. Therefore it needs to be disposed of very carefully in such a way that the radiation cannot reach human beings and other living organisms. One method to do this is to bury the waste in deep pits. </span>