from h+ Magazine: ⇦ Much more at source
Artificial photosynthesis may soon be a reality – splitting water into hydrogen and oxygen. You only have to look as far as your garden to observe one of the most common chemical reactions in nature at work pulling apart water molecules (H2O) and splitting them into carbohydrates and oxygen (O2).
Nature provides the template for this process using the energy from sunlight to fuel the reaction. Here’s a video showing the basic process: