The Best Option: Composting
Because it uses oxygen to decompose the organic waste, proper composting does not generate any methane. It creates minimal nitrous emissions, and releases only a small amount of carbon dioxide, which is considered to be a healthy part of the natural carbon cycle.
Not only does composting reduce the amount of waste sent to landfill, reducing the potential for ground and surface water contamination, but it also helps put valuable nutrients back into the earth, maintaining the natural soil balance, improving its structure, as well as its capacity to hold water.
It provides the fertilizer nutrients of nitrogen, phosphorus, and potassium in forms that are necessary to plants, and releases them gradually, at the rate that they can naturally be absorbed.