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I am not surprised coffee grounds can be part of the future's lighting. Just as I am not surprised should the Hudson Hornet be reincarnated and used as an interspace vehicle. However, for the meantime, I will continue to use coffee grounds for 2 specific results:
1) Ants, and various other insects, do not like coffee grounds, so I use that in my garden;
2) Coffee grounds, when placed into dirt, draw earthworms, so I use that in my garden.
One of the beneficial usages of coffee grounds, should you be so inclined, is the cuppa.