California has current forms of energy derived from wind, geothermal, biomass, and solar resources. One gram of the isotope 235Uranium is capable of releasing energy equal to 14 barrels of oil or 3 tons of coal. Nuclear reactors utilize the process of fission. Montana and Wyoming hold most of the natural gas reserves in the U.S. 40. South Africa has over two thirds of the worlds reserves of aluminum.
Manufactured gas is produced from petroleum.
Water contracts upon freezing. Depending on the climate, soils require hundreds to thousands of years to form. Exfoliation joints result from compression. Methyl hydrates occur as gas-rich crystalline ices in the Earth's deep mantle. Nuclear power and coal are the most inexpensive sources of energy used to make electricity.