Sir, – You report that the world is in danger of running out of the key elements tantalum, yttrium, gallium, indium ("Almost 5 million smartphones discarded in Ireland, new study shows", News, November 12th).
Not while Scrabble players continue to mine these valuable words for all they are worth: 14, 20, 10 and 9 points respectively. – Yours, etc,
Dr JOHN DOHERTY,
Gaoth Dobhair,
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Co Dhún na nGall.