Organic materials, such as yard trimmings and food scraps, contribute to approximately two-thirds of the solid waste stream. Not only is food waste heavy, it is wet and takes more energy to incinerate.
Composting is one of the best things you can do for your garden because it produces nutrient-rich soil that will feed your plants and also helps retain moisture in the ground, so less watering in the summer or drought.
Also, by keeping food scraps out of your trash bag, the annual solid waste tonnage that is hauled away is decreased.
If you are new to composting, the links below can get you started and on your way. You don't need a big space to compost, either.