Former technology officer for Microsoft Nathan Myhrvold thinks that he has found a cheap and reliable way to solve global warming. He wants to run a hose up to the stratosphere with balloons and using that hose to pump out enough sulfur particles to dim the sun's heat just enough to counteract the effects of global warming. The estimated cost would be about two hundred and fifty million dollars. He thinks that there would not be any unintended consequences - like starting a new ice age or making our waterways so acidic from acid rain that all aquatic life dies out.  But he's not sure...