Carbon Robotics’ machine uses AI technology to zap weeds in farms across the globe. (Carbon Robotics) Seattle startup Carbon Robotics raised $70 million in the latest vote of confidence from investors in the company’s agriculture technology platform that helps farmers eliminate weeds without the use of herbicides. San Francisco firm BOND invested for the first time and led the Series D round, which also included Nvidia’s venture capital arm. Carbon Robotics has raised $157 million since launchin...