Of the bacterial isolates found in the Arctic that are able to degrade PCBs, none used compounds such as 2-chlorobiphenyl, 3-chlorobiphenyl, camphor, citronellol, cymene, dehydroabietic acid, limonene, methanol, n-hexadecane, pentachlorophenol, phenol, or pinene as primary growth substrates (Master and Mohn 1998).
In the 20th century, demand for electricity led to the consideration of geothermal power as a generating source. Prince Piero Ginori Conti tested the first geothermal power generator on 4 July 1904, at the same Larderello dry steam field where geothermal acid extraction began. It successfully lit four light bulbs. Later, in 1911, the world's first commercial geothermal power plant was built there.
Geothermal energy is also widely used in the state of Nevada. Geothermal energy got its name from Greek words: geo (earth) and therme (heat), and therefore geothermal energy is in fact Earth's heat.. Geothermal energy has minimum negative environmental impact.Geothermal energy is giving 18 % of Iceland's total electricity.eothermal energy is also widely used in the state of Nevada. Geothermal energy got its name from Greek words: geo (earth) and therme (heat), and therefore geothermal energy is in fact Earth's heat.. Geothermal energy has minimum negative environmental impact.