Eventually Dyson published a paper titled “Can We Control the Carbon Dioxide in the Atmosphere?” His answer was yes, and he added that any emergency could be temporarily thwarted with a “carbon bank” of “fast-growing trees.” He calculated how many trees it would take to remove all carbon from the atmosphere. The number, he says, was a trillion, which was “in principle quite feasible.” Eventually he would embrace another idea: the notorious carbon-eating trees, which would be genetically engineered to absorb more carbon than normal trees. - berkay