Currently, most hydrogen is made this way from natural gas. An electrical current can also be used to separate water into its components of oxygen and hydrogen. This process is known as electrolysis. Some algae and bacteria, using sunlight as their energy source, even give off hydrogen under certain conditions.
Originally, metal roofs were made of corrugated galvanized steel: a wrought ironâsteel sheet was coated with zinc and then roll-formed into corrugated sheets. Another approach is to blend zinc, aluminum, and silicon-coated steel.
A penny is made from zinc coated with copper.    Copper is a reddish brown nonferrous mineral which has been used  for thousands of years by many cultures. The metal iâ¦s closely  related with silver and gold, with many properties being shared  among these metals.