It is depressing how often I hear (mostly from folks my parent’s age or older) that “this whole sustainability thing” is just a passing fad, something that will eventually be ignored and forgotten.  Their favorite example is the 1970′s oil crisis and the hullabaloo that surrounded it briefly before we went back to our old, wasteful ways.  Does anyone else remember those “OPEC Loves it When You Leave the Lights On” stickers over light switches?  But apparently the folks over at EL Insights haven’t got the message that green should be replaced by another, more fashionable color this season.  They did some actual analysis and project the green building market to grow from it’s current size of about $70B to a staggering $170B in just five years.  That’s explosive growth and indicates, to this layman, that the movement to sustainability is not a passing concern but a fundamental shift in our thinking.  Warning: this may be the only good news you hear regarding the economy this week.