Nathan Zecks Mazvazva, a 25-year-old farmer in Zimbabwe, stands in his sugarcane field, marveling at a recent savings of 60% on irrigation costs. And sugarcane is just part of Mazvazva's property in Zimbabwe. He owns nearly 500 acres, growing green beans to green peppers. Simply put, technology-more specifically, drones-is making his livelihood more cost efficient. []