Well metal detectors can help to save a life in the event that someone has a weapon or is armed, the dectector can sense the metal in a gurn, for example, which can sve lives because if that person meant harm on others, the gun can be detected before somethinf terrible happens. Hope this helps!
"Yet every one of these disasters has actually happened somewhere, and many real communities have already suffered a substantial number of them. A grim specter has crept upon us almost unnoticed, and this imagined
tragedy may easily become a stark reality we all shall know."
The atmosphere is a peculiar thing. There can be different things in the air and we wouldn't even know it. We inhale different things from the atmosphere and we sometimes don't even notice.
Energy is in everything. We have energy, a pencil has energy, heck! A piece of cheese string has energy. When we move, we are using our energy, when a pencil writes or falls, that is energy. When we eat cheese, it turns to energy in our stomachs!
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