**6. Conclusions**

Human habitats are safe, resilient, sustainable, and a universal access to affordable, reliable, and sustainable energy, It's a world everyone dreams about. The world's eyes are turning toward alternative sources of traditional energy. Although wind and hydro power are also making progress, solar energy is becoming preferred due to its increasing affordability. Food preservation by drying is the time-honored and most common method used by humans. Food dehydration is one of the most important achievements in human history, it has achieved food security for humans even under the adverse environmental conditions that make it difficult to supply fresh food daily. Food drying techniques have long been applied since ancient times in conventional ways, such as drying in the sun. From the traditional to the most innovative, there are several drying solutions. Successive technological developments that have been going on for a long time had a significant impact on the growing consumer desire to obtain high-quality and safe agricultural products, whether the quality of the external appearance or the quality of the nutritional value of these products, whether fresh or dried. Therefore, a huge development has been achieved in drying technology for agricultural products. Starting with solar drying, traditional methods by convection, and drying using electromagnetic spectra such as microwave drying and infrared dryers, and newly invented methods. This continuous, renewable, and accelerated innovation in the field of food drying technology is to fulfill the consumer's increasing desire to achieve food security not only by providing food but with high quality, healthy and safe food. So far, no comprehensive research on industrial solar drying has been performed, and hopefully, further development in solar dryers based on the three "A" principles will take the shape in future, that is, Affordability, Availability, and Accessibility.

Food for all, no poverty, renewable energy, and employment generation are some of the key features. The future scope of solar dehydrators is mostly to increase usability for small-scale farmers and users by decreasing costs, increasing reliability and versatility, and making it easier to obtain. This in turn will increase production and lower the crisis of food for the human population.
