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Coal
Coal became a dominant energy source in the mid 1800's. -
Wood
Wood, a renewable energy, served as the primary form of energy until the mid to late 1800's. -
Hydroelectricity
Hydro Power has been used for many years, but has now advanced with the invention of dams. -
Natural Gas
Natural gas becomes a very popular source of energy around 1885. Although it is a non-renewable recourse, it is still very efficient. -
Wind
Wind power became a new way to create renewable and clean energy in 1888. -
Solar Power
Soon after the invention of wind power , solar power became another way to create renewable energy. -
Petroluem
Petroleum, also known as prude oil, is made mostly of organic compounds and is used to generate electricity. -
Hoover Dam
Construction begins in 1931 for the largest dam built at the time. The Hoover Dam provided much electricity for the developing south-west. -
Fracking
Hydraulic Fracturing, or fracking, is a technique designed to recover gas and oil from shale rock discovered around 1949. -
Nuclear Power
Nuclear power increased in population in 1960. Although a non-renewable resource, it was still a main source of energy.
