Less consumption of goods, banning of 'planned obsolescence' by manufacturers, and other methods of curbing manufacturing and other industries would make the largest 'dent' in any future world power crisis.
When I see how much land we have in Canada, and think about it. How many factory workers (who are now unemployed) could own and operate community farms? That takes care of the 'factory farms' and great waste of grains, not to mention the gross treatement of the 'livestock' (oh how I hate that term). The flesh/eggs/dairy/produce would not contain the pesticides and hormones, oh, and antibiotics it now does.
Technology that is already proven and developed, could be used to generate power from wind in big cities via small specialized systems that have been created for tall buildings.
Single-family dwellings could utilize a few solar panels to heat water, and cut down personal grid use (yes, I have a friend who bought and installed his panels over 15 years ago, and you should see how the figures add up over the time).
I like this generating system. It would be ideal for small farms, or communities / groups who wish to share land. The Tidal Project here was a great dream that somehow got lost, Caedes, it's too bad. From what I've been able to read about it as a lay person, it's just not that good. :( I live a short drive from the Bay of Fundy, so it was a big deal when I was a kid.
Some may say I'm a dreamer, but I'm not the only one. JL 1940-80
Peace, love and Gaia! xx
tal