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.
Carbon is one of the most important elements to life on planet Earth. It forms more compounds than any other element and forms the basis to all plant and animal life. Carbon is the fourth most abundant element in the universe by mass and the second most abundant element in the human body. Carbon is constantly cycled through the Earth's oceans, plant life, animal life, and atmosphere. Click here to learn more about the carbon cycle.