Kim Stanley Robinson's works have been steadily drifting in the direction of despair and apocalyptic scenarios. By now he probably regrets writing the Mars tril

Kim Stanley Robinson's works have been steadily drifting in the direction of despair and apocalyptic scenarios. By now he probably regrets writing the Mars trilogy -- his deepest sympathies having drifted more and more towards his few characters who radically opposed the establishment of human civilization there. On a side note, I find it interesting that he asserts that the ideal level of CO2 is at 350 ppm. I'd like to understand why one should want it so low, since dipping to 150 ppm would cause massive land-based extinction of plants.