Nice title huh ? The Imperial collage of London (guess only imperialists have access to enough blood for such systems) has a new technique where a complex molecule based on human blood serum can be used to hydrolyze water into hydrogen and oxygen. From the article :
Scientists 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. This molecular complex can use energy from the sun to create hydrogen gas, providing an alternative to electrolysis, the method typically used to split water into its constituent parts. The breakthrough may pave the way for the development of novel ways of creating hydrogen gas for use as fuel in the future.