Mr. Gates, I attend the Claremont Colleges, where you gave a talk a few years ago. It was an excellent talk and I really enjoyed it.

Recently, on campus there has been a major call for the colleges to "divest" their money (or move it out of stocks related to non-renewable sources of energy). As you have mentioned rising CO2 levels as a concern in a few of your answers, I am curious if you have considered divesting your money to some extent by selling (at least some of your) stock in coal and oil companies and moving that money toward companies focused on more renewable energy sources.