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Ed Reid's avatar

Happy Thanksgiving backatcha. ;-)

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Barry Butterfield's avatar

I was beginning to think you'd retired, but thankfully Monday happened on a Wednesday this week.

First, a Happy Thanksgiving to you and your family, loved ones, and all those whom you hold dear.

The minerals we use in a lifetime was interesting and instructive. But I'm curious about that, in a different context. Vaclav Smil writes of his "four pillars of civilization, cement, steel, plastics, and ammonia. Are you aware of any charts showing an individual's life in terms of those four substances?

Another question. There are many discussions about the mineral needs of nut-zero, but why has no one looked at the basic need for steel to convert 80 percent of our fossil energy to renewables? Many have done land (and it's incredible), but few have tallied the impact to the steel industry. Why not?

Again, happy Thanksgiving and thank you for your good work.

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