What makes plastic so cheap and easy to produce as opposed to any other material?

Polyethylene, polystyrene, and most plastics are made from leftovers after fuel is produced from oil. Plastics are effectively subsidized by gas sales, and are effectively a waste stream.

One of the interesting consequences of moving towards renewable energy will be higher plastic prices. It will be interesting watching this play out.

What is generally used to cool down superconductive elements?
What is the highest a mountain can be? Is there a limit to it?

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