Drones are being to become bigger,smaller,faster and more efficient. China is making drones that can be controlled from a distance of five kilometers. Drones are used for tracking Whales,fertilizing crops and a lot more that they can do to help out.700,000 drones are bought each year from Americans. Drones can fly up to five houses high and almost as tall as the Alps. The biggest drone was almost 4 feet wide.
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