"Green" is incredibly awesome...if it can be economically feasible without subsidy and is a "win" for the consumer. For example:
One of my huge interests is in ICF houses (Insulated Concrete Forms). These are like Styrofoam Lego's that you can build a house with...except in the middle they are hollow, with ties across them to place rebar. Then, you fill the blocks with concrete. What you end up with is a wall that is probably 10 inches thick, six of which is steel reinforced concrete and then the drywall on the inside and exterior finish on the outside (Brick, Stucco, Lap, whatever). This leaves something like R1,000,000 for insulation. Also, it won't support fire, and Texas Tech shot a two-by-four at a wall like this with a special cannon at 250mph and it hit the wall and shattered without penetrating the wall (as opposed to other traditional building methods where the board penetrated the wall like it was hot butter and didn't even slow down). The advantage is remarkably lower heating and cooling costs, the ability to use much smaller HVAC equipment for a huge house, and the obvious safety aspects (tornado's, fire, etc). The cost to build a house like this is maybe ten-percent more than a "real" house - but the immediate cost savings (utilities, insurance) and cash-flow improvement pays you back quickly. This is an example of a "green" technology that makes sense. Couple a house like that with geothermal and you'll never really pay the utility companies anything ever again - another example of sensible "green" technology. I think the key is, these things stand on their own two feet. Biodiesel, Ethanol, Wind, Solar, etc do not - they need significant government subsidies to make any kind of sense.
EDIT - in fact, a wet-dream for me would be an earth-contact house made with ICF and geothermal. And heavy-machinegun nests out the exposed side.