The ability to invent and create is second nature to the human species; we have learned to fly, dive deeper than most animals, manufactured artificial intelligence, and we have now designed a man-made leaf that can conduct photosynthesis. The technology utilizes the same components, carbon dioxide and sunlight, to create oxygen. While the science behind the leaf is complex, the usefulness is quite obvious. The technology can be used to stabilize Earth's atmosphere or even help generate oxygen on nearby planets such as Mars. This could be the key to the colonization of planets in our time!

http://www.techtimes.com/articles/39312/20150312/man-made-leaf-produce-fuel-artificial-photosynthesis.htm