Hydrogen makes an extraordinarily efficient and clean fuel. Three times as energy-efficient as petrol, Nasa used it to power its space shuttles. It can be used to generate electricity and only produces water as a byproduct. we must take advantage of an abundant natural resource, sugar . Biomass – trees, plants and other waste vegetable matter – is an abundant and rapidly renewable source of starch and sugars. Exploiting biomass to produce sugar, and turning that sugar into hydrogen, could lead a change in global energy production.