Americans are primed to spend up to $104 billion on “green” technologies this year — but don’t know where to find them, says a new study. Which seems crazy, considering the plethora of green-shopping websites and companies joining in on the “green revolution,” but what do we know? According to the survey conducted by Rockbridge Associates, some half of the spending on green technologies this year could come in the form of easier-on-the-earth vehicles.