Silos ensure good storage because of the air-tight environment created. Silos are designed to be airtight, which helps to prevent moisture and air from entering, which can lead to spoilage or insect infestation. By keeping the stored grains or other agricultural produce in an air-tight environment, the quality and shelf life of the produce can be preserved for longer periods of time. This is particularly important for long-term storage of produce to prevent spoilage, which can result in losses for farmers.