Really, so if he proves that it can remove CO2 from the atmosphere, which I'm confident he is right about, has he proofed it is safe to do so on the scale requi

Really, so if he proves that it can remove CO2 from the atmosphere, which I'm confident he is right about, has he proofed it is safe to do so on the scale required, simply no. Our models of real world are woefully general, I doubt we even have the computing power available to crunch all the variables. It seemed a good idea to bring cane toads to Australia to combat the damage done be cane beetles, foxes were brought to combat rabbits. Hint, none of these attempts at environment management went well, even though they are relatively simple problems; foxes eat rabbits right?