1 If living in an area with frequent thunderstorms, consider buying a lightning protector. 2  These cost between $35 and $55. 3  Keep in mind that an invisible fence doesn't keep other dogs, animals or people out of the yard. If living in an area with frequent thunderstorms, consider buying a lightning protector. 2  These cost between $35 and $55. 3  Keep in mind that an invisible fence doesn't keep other dogs, animals or people out of the yard.
Carbon is essential for the survival, growth and reproduction of living things. It is a finite resource that comes in different forms and transfers from living to non-living things in various ways. Carbon stays balanced with other chemical reactions in the air and bodies of water through the carbon cycle.
The study of carbon molecules is called organic chemistry, and there is a subset, biochemistry, that deals with the carbon molecules in living organisms. Even outside of the realm of biological life, carbon is important, especially to industry. Carbon is a critical component of fuel, such as gasoline or coal. Diamond (pure carbon) is used for drills as well as jewelry, and graphite, another form of carbon, is used in pencils.