Last week Google announced that the company, and its philanthropic subsidiary, Google.org, would explore research and develop renewable energy.  The goal is to ultimately produce one gigawatt of renewable energy and do so more cheaply that coal-generated electricity, which of course creates vast amounts of CO2.  I was thrilled to read the news reports of this announcement.

As someone who thinks about the future, converting global society to alternative and renewable types of energy and away from fossil fuels is perhaps the top challenge humanity …