Domo-ori-gato, Mr. Tomato

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Here's a video of a Japanese exoskeleton that is made to help elderly rural farmers continue on in the task of growing and harvesting vegetables and whatnot.

It looks strange, but I'm all for anything that helps people maintain self-sufficiency, even when their body no longer is able to naturally do so on its own.

I do wonder about the net impact of such a device. Does the cost to purchase, maintain and power a device like this far exceed the amount gained by growing your own veggies?