Researchers at Tel Aviv University have genetically modified algae in a way that could enable it to be used to mass-produce hydrogen on an industrial scale, which is big news, considering 90 percent of hydrogen produced in the U.S currently comes from fossil fuels. Natural algae can produce small amounts of hydrogen, but when modified, the algae can produce up to 400 percent more hydrogen. The team of researchers are now searching for ways to harvest mass quantities of the clean-burning fuel.