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  • Nickel Cadmium Batteries

    The nickel-cadmium battery (NiCad) is a popular type of rechargeable battery used in portable power tools.

  • Non-Ferrous Metal

    The term non-ferrous is used to indicate metals other than iron and iron alloys that do not contain an appreciable amount of metals, especially aluminum, copper, brass or bronze.

  • Non-Renewable Resources

    Energy sources that are used and consumed faster than they are produced by nature are referred to as non-renewable. These include coal, natural gas, oil and other fossil fuels.