Something that we just started seeing in robotics at the beginning of 2015, dedicated disassembly robots. They should be able to replace much of the disassembly done in places like China or Ghana where containers of old electronics have been dumped. In terms of a project that helps the world I would totally invest in such robots.
[1] (Warning its Mashable) http://mashable.com/2016/03/21/apple-liam-recycling-robot/#f...