Even with new products, such as better seeds, or greater volumes of them, such as industrial production, the poor still require access to these products. Improving road and transportation infrastructure helps solve this major bottleneck. In Africa, it costs more to move fertilizer from an African seaport inland than to ship it from the United States to Africa because of sparse, low-quality roads, leading to fertilizer costs two to six times the world average. Microfranchising models such as door to door distributors who earn commission-based income or Coca-Cola's successful distribution system are used to disseminate basic needs to remote areas for below market prices.