This sounds like a great idea to combat deforestation. 26 billion trees cut down each year and only 15 billion replanted? The drone can be tasked to drop seeds in areas where no trees are currently growing (possibly using satellite imagery to pinpoint these locations?) and each seed will be coated in a nutrient rich gel to encourage rapid growth.
A really clever, positive use of drones.
Hopefully birds wont catch on that these flying seed dispensers exist or we'll see similar scenes to this as UAVs cross our skies.