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They add copper as part of the purification process
by tfha 8y ago
They add copper as part of the purification process
- apo 8y agoWhat's the source? The article says nothing about it, and seawater contains copper and other metal ions all by itself: https://web.stanford.edu/group/Urchin/mineral.html https://web.stanford.edu/group/Urchin/mineral.html