Planting 36,000 trees in a day for about 15% of the cost of traditional methods: that’s the promise of BioCarbon Engineering, an Oxford-based company that aims to fight climate change through effective reforestation. Drones can survey land for restoration potential, and plant up to 10 pre-germinated seeds per minute, no matter how remote and inaccessible the area is. BioCarbon’s goal is to plant 1 billion trees per year.