note
ambrus
<p>
<strong>
Future historians will find that the material characteristic to the era starting now is…
</strong>
<p>
(4000-2001 BC was copper age, 2000-1 BC was bronze age, 1-2000 AD was iron age.)
<ul>
<li>
aluminium
<li>
plastic
<li>
oil
<li>
water
<li>
carbon dioxide
<li>
copper again
<li>
iron again
<li>
silicon
<li>
salt
</ul>
<p>
<b>Update:</b> [ramrod] makes a valid point, maybe “uranium” or “hydrogen” should be added as well.
<p>
<b>Update:</b> appeared as [id://804338].
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