Drones are aerial vehicles which do not require piloting. They are operated either by a ground controller or an onboard computer. They were initially designed to replace humans on missions that were considered too dangerous, or not suitable for human pilots. They can take aerial photographs and videos of high quality, and collect vast amounts of image data. The majority of them can be controlled by users with very little experience. They can monitor situations, identify possible hazards, alert people about unsafe conditions as well as create and maintain safe environments. This technology is continually improving, and the cost of buying a drone is not as expensive as it used to be. They are vulnerable to wild animal attacks and can also endanger nature. They are even used to record important events like sport games, concerts and festivals. Lithium polymer batteries used in drones are extremely sensitive to moisture and flying is strictly prohibited on rainy days.
