Puzzle Description:

Nickels falling in the wind, without a care in the world, wanting to start again - it makes you think. Nickel is chiefly valuable in the modern world for the alloys it forms. About 60% of world production is used in nickel-steels (particularly stainless steel). Other common alloys, as well as some new superalloys, make up most of the remainder of world nickel use, with chemical uses for nickel compounds consuming less than 3% of production. As a compound, nickel has a number of niche chemical manufacturing uses, such as a catalyst for hydrogenation. Enzymes of some microorganisms and plants contain nickel as an active center, which makes the metal an essential nutrient for them.

#1: besmirched tea (Besmirched Tea) on Oct 26, 2020 [SPOILER]

This looked tougher than it turned out to be.
I wasn't sure what the black was.
Thought it might be ore or something.

Nickel-Cadmium batteries were a big deal until Lithium ion ones came along.

Not a clear illustration.

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