We can harvest rainwater by simple means such as collecting it in a bucket, or it can be an elaborate process which involves accumulating it in underground cisterns. Recycling rain water means that one is less dependent on water supplied by the utility company for gardening purposes. Rainwater harvesting also helps to decrease erosion and flooding. Areas that are prone to be chronically wet in the backyard can also be kept dry. This rain barrel water can be used to water your plants and lawns.