Urbanization and Its Implication for Sustainable Development in a Circular Economy
Only about 25% of the world's land area and soil can be viewed as sustainable for agriculture. The rest of the soils are too dry, too wet, steep, rocky, cold, shallow, acidic, alkaline, or saline to allow the growing of crops. The major problems lie on the harshly increasing need for agricultural products due to rising populations as well as to the world desire to attain ever higher living standards. Food shortage, increase in toxic chemical in production, and urbanization are three inseparable things. One way to solve food shortage is to increase agricultural production. However, increase of agricultural production involves a package of measures that must be fitted to the specific situations in each case. Those measures are the use of high-yielding crops like cassava and varieties and a set of treatments designed to optimize growing conditions. Among such treatments is the use of nature-based solution like the use of cassava waste in feeding of livestock, use of cassava waste as a manure, minimizing losses of water and nutrients due to runoffs.