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Scientists Create New Material Five Times Lighter and Four Times Stronger Than Steel
(scitechdaily.com)
This is a most excellent place for technology news and articles.
I mean... maybe? There are a host of environmental costs to those as well. Certainly, the nice thing about plastic is that its cheap to mold where as metal and wood and glass take a lot more energy to manipulate. The problem is that its too cheap, and so it gets used far in excess of its long term utility.
Sure. Which is why I'm not holding my breath. But new materials can be useful even if they aren't cheap.