The most abundant element
Hydrogen is the 1st element on the periodic table and has an Atomic Mass of 1.00794. It has 1 Proton and 1 Neutron.
Fuel cells do not burn the fuel they use, but combine hydrogen with oxygen from the air to produce electricity. The vehicles emit only water vapor.
Fun Fact 1:
"Can Hydrogen Be the Fuel of the Future?." DNews. N.p., n.d. Web. 26 Mar. 2014. <http://news.discovery.com/autos/drive/can-hydrogen-be-the-fuel-of-the-future.htm>.
"Michigan Ann Arbor Bay City Detroit Flint Grand Rapids ." The Flint Journal. N.p., n.d. Web. 26 Mar. 2014. <http://www.mlive.com/news/flint/index.ssf/2012/05/mta_opens_alternative_fuel_fac.html>.
"Properties of Hydrogen." Boundless. N.p., n.d. Web. 21 Mar. 2014. <https://www.boundless.com/chemistry/nonmetallic-elements/hydrogen/properties-of-hydrogen/>.