Sensors include visible spectrum cameras, 3D laser scanners and a spectrometer analysis (just to name a few) that creates an accurate analysis of waste which has not been possible with mechanical technology or human labor before.

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There are contractors (that surveys like MBOPartners cover), casual global freelance pools on sites like Elance, and increasingly crowd-based labor sites, which gather around sites like Mechanical Turk and Crowdflower, where, once again, US workers predominate.

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