Japan uses new environmentally friendly technologies to extract regenerative materials from used batteries to produce high-purity alloys. Medieval alchemists once tried to make rough metal into gold, and now the scientists at the US Naval Research Laboratory are better able to turn waste into diamond. In theory, when the organic solid passes through high temperature and high pressure, it usually forms a glittering crystal. In fact, this "treasure" can now be made from carbon-containing waste gas. There is a wastewater treatment plant near the US Naval Research Laboratory that produces 1.3 million cubic feet of methane per day. The lab's chemist James Butler placed the treated methane on a tungsten wire with a temperature of 4000 degrees Fahrenheit. After a while, a shiny synthetic diamond film appeared. Due to the extremely high temperature, the carbon atoms in the methane are separated and then combined layer by layer to become crystals. Although this diamond is not a few thousandths of an inch, the hardness has reached the standard. It is very satisfactory for the manufacture of wear-resistant machines, scratch-resistant lenses and state-of-the-art computer components.
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