The planets that reside in the <u>Outer </u> region of the solar system are Jupiter, <u>Saturn</u>, Uranus, and Neptune. Although these planets are made up of lighter elements, they have a solid core. The atmosphere of all these planets is made up of hydrogen and <u>helium</u>. In addition to these two elements, the planets Neptune and <u>Saturn</u> contain methane.
Uranium extraction from seawater: Uranium is most often mined from the Earth's crust, but it can also be extracted from seawater, which contains large quantities of uranium<span> (3.3 ppb, or 4.6 trillion kg). Theoretically, that amount would last for 5,700 years using conventional reactors to supply 15 TW of power.</span>
Sedimentary is b
igneous is a
metamorphic is e
