Three Inventions That Could Save The World

This is part two of the good news episode. Three inventions that could save the world.
1) Artificial leaf could power civilization – https://abcn.ws/17LfIFd
2) How to clean up the oceans – https://bit.ly/1a4B52y
3) Butt-chugging – https://www.huffingtonpost.com/tag/but…
4) Urine-powered generator – https://bit.ly/14WijK5
5) Music by Iron Age Mystics – https://www.reverbnation.com/ironagemystics