Instead of using ink cartridges in printers, why not harness the awesome power of the sun to print words on paper? Industrial designers: Hosung Jung, Junsang Kim, Seungin Lee, and Yonggu Do envisioned just that with their Solar Printing concept design. This is a cool concept not only because its thinking out of the box big time, but also because it has the potential to make a major positive impact on the environment. Think about all the ink cartridges in landfills. Brilliance.