Composting is simply the return of nutrients to the soil. When plants grow, they use energy from the sun, and nutrients from the soil. It is somewhat logistically challenging (and unnecessary at this point) to return energy to the sun, but it is extremely easy and necessary to return nutrients to the soil. At its most basic, composting has two steps:
1) put organic material in a pile
Of course their are many more sophisticated composting systems. Choosing the right system for you depends on how much energy you are willing to put in, and the amount and frequency of compost you would like to get out.
Here are some examples of composting systems which HOGS has installed..