Last year’s UN Climate Summit committed to plant some 300 billion trees. However, with our current planting techniques alone we may not be able to get that done in a timely and affordable way. That’s where drones come in. At BioCarbon Engineering, an Oxford-based start-up company, engineers believe the first automated tree-planting drones will be able plant around one billion trees per year in order to help counter industrial-scale deforestation across the world. This way, reforestation will become cheaper and faster, while drones will be able to access places that are too difficult or dangerous for humans to get to.