How much gold is dissolved in the world's seawater, in tonnes?

Q: How much gold is dissolved in the world's seawater, in tonnes?

20 million tonnes (20,000,000). Worth about a quadrillion dollars — but it's so dilute it would cost more than that to extract. Source: NOAA

20 million

tonnes

20,000,000 exactly, give or take

Worth about a quadrillion dollars — but it's so dilute it would cost more than that to extract.SOURCENOAA

Scale check: 20 million is roughly all of Greater London.

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