Chutes and tables – PatentStorm

4319985 Gold concentrator A gold concentrator comprises a housing at the end of a sluice into which a quantity of sand, rock and gold particles is deposited. 3941690 Portable sluice pan A portable sluice pan is described for panning for gold and other valuable heavy minerals from placer deposits.

Yale Environment 360 – Feature Archive

But two policy analysts argue that embracing a monolithic energy future dominated by gas will mean the loss of a golden opportunity: Leveraging cheap, abundant gas to create a sustainable future based on renewable power.

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