Genetically Engineered Proteins Generate Hydrogen from Sunlight

Here's a very exciting scientific development:
Professors Tsuchida and Komatsu from Waseda University, Japan, in collaboration with Imperial College London, have combined two molecules that occur naturally in blood to engineer a molecular complex that uses solar energy to split water into hydrogen and oxygen, says research published in the Journal of the American Chemical Society.

From ScienceDaily

This could potentially lead to a boom for hydrogen-based fuel. Hydrogen is the perfect fuel in many ways, because burning it produces only water. No greenhouse gases, no pollution. Unfortunately, the only way to get hydrogen is to use electrolysis, which requires large amounts of electricity, which is often produced by fossil fuels. This biological alternative to electrolysis promises completely carbon-free energy.