A self-driving farm robot that kills 100,000 weeds an hour may solve two big farming problems - declining soil health and vegetable nutrition. Carbon Robotics' Laserweeder has eight 150-watt lasers that can fire 20 times per second, guided by 12 high-resolution cameras connected to AI systems that distinguish good crops from bad weeds. The Laserweeder can clear 15-20 acres in a day, using computer vision, GPS, and LIDAR. It drives 5 miles/hour and works all night long, using high-powered lights. Carbon Robotics has raised a $27 million for growing its sales, support, engineering, and marketing.

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