I can't imagine life without Metallica or Megadeth.
Anonymous · 4 weeks ago
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· just now
Most of these replies consider only the elemental metals but metals have a rich chemistry which is essential to life. Major amongst these is the role of iron in the body's circulatory system. Haemoglobin and myoglobin both rich in iron are essential in all our metabolic processes as the iron they contain allows us to harness oxygen from the atmosphere to process our food. So in addition to "no cars, nuclear weapons, pollution, etc" you could add no life as we know it.