There was a portentous tone at this year’s Greener Gadgets Conference.  Right out of the gates, scientist/DIY guru/inventor and keynote speaker Saul Griffith minced few words about global warming.  He presented a dizzying array of graphs, charts and figures about our current energy consumption habits and the dire consequences that will almost certainly ensue if we continue at the rate we’re going.  One such figure showed how the average American would have to carry 23lbs. of oil to fuel his or her daily energy habit.  He stressed, in earnest, that we couldn’t persist in this way without inducing a global [...]