I think that the problem is not in green energy or "standard" energy sources but in our way of thinking. When I was on university on micro and nanotechnology specialisation we learned a lot about new materials specialy based on carbon: nanotubes, graphen etc. If people would like to, we could develop and build more optimal energy infrastructure with less losses, key is in new wire and battery technology. I think that lot of companies didn't want to develop new technology in batteries because it could make waste for their current factories (they should build new ones) and building new energy infrastructure would cost a lot. With old infrastructures and energy storage technologies we couldn't build "green" energy sources e.g. solar sources in places where it could give most optimal effect. I think that we should still use gas sources, and we should develop more optimal ways of using it e.g. for our cars. There are a lot of food industry waste (also in our homes) from which we could make gas for energy use. In the future when we could develop methods to destroy harmful radioactive waste (I readed somewhere that even now there could be biological organisms that eat this waste) or find new better energy sources we could make our vehicels on air in the place of vehicles on gas (in fact, now there are companies that produce cars on compressed air, it's not optimal because of a lot of energy waste to generate those air but if we could in the future make it more optimal in energy produce and compressed air produce then, we could have car's that didn't waste any of "materials" in our word). Even now every one of us which live in the place where temperatures are higher than 21 C could buy his own little biogas factory from waste (or build one):
In my opinion, in time of two generations we could build a society where energy and food are almost for free (there always would be cost of repair of new infrastructure) but it would be needed for people to cooperate with each other and know what to do in right way. Instead of this we have now not optimal technology with good advertisment to buy it and waste our money and health with people who didn't know things about those technologies.