Pure hydrogen is not abundant on Earth but can be produced a variety of different ways. Hydrogen is an extremely promising energy resource because there are many sources of it and many ways to create it. Almost every place in the world has a resource that can be used to create hydrogen. Unfortunately the current methods of hydrogen production are often inefficient, costly, and some require fossil fuels. Therefore, scientists are engaged in the search for a production method in which hydrogen could be produced in large or small quantities, and be used in fuel cells to power almost anything, with only water and heat as byproducts.