Technology Pioneers - revolutionary innovations | Made in Germany

The World Economic Forum says it is committed to "improving the state of the world.” Its annual list of Technology Pioneers honors companies that address challenges in various fields. German firm Heliatek made it onto the list in 2015. It aims to supply green energy to the world’s major cities. Grit Hofmann got the lowdown on the company.

More from this edition of "Made in Germany": http://www.dw.com/en/made-in-germany-the-business-magazine-2016-01-19/e-18947041-9798