A process known as “cracking” is being viewed as a potential for making hydrogen power more realistic for automotive purposes. Hydrogen is thought to be one of the best alternative fuel sources, but managing it has complications. Ammonia cracking is seen as a safer, less costly method of making hydrogen available. Cracking separates ammonia into one part nitrogen and three parts hydrogen. Hydrogen is typically produced by steam reforming natural gas, a process that wastes some of the energy stored in the gas, but a more significant result is the release of large amounts of CO2, considered to have a negative effect on the environment.