Olympic gold medals are only 1% gold and 92.5% silver. They…

Olympic gold medals are only 1% gold and 92.5% silver. They would be worth over $25k if they were pure gold but instead the medal value is only approximately $600. source

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a gym called Eco Gym uses cardio equipment which harvests energy…

a gym called Eco Gym uses cardio equipment which harvests energy from the workouts of its members as a method to cut down on its energy bills. The savings are then passed back to the gym members, giving them an incentive to return for more regular exercise.

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