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Or try and train birds [0]. Bird feed is cheap. [0] https://www.popularmechanics.com/technology/startups/news/a28543/startup-trains-crows-to-pick-up-trash/ htt

by Nadya 8y ago

Or try and train birds [0]. Bird feed is cheap. [0] https://www.popularmechanics.com/technology/startups/news/a28543/startup-trains-crows-to-pick-up-trash/ https://www.popularmechanics.com/technology/startups/news/a2...