@ Age, I'm 23. No, I don't have much sense on how life was different thirty years ago.
My point is that we still had lives and an advanced (if woefully inefficient) society, even though we used less energy then. Same with 1950 or 1910. I don't think the future of energy and technology will simply replicate any particular year in the past, and I'm pretty sure that Mr. Greer has said the same thing. (It's been a while since I read the Archdruid Report.)
As an experiment, track how much oil, gas, coal, and nuclear energy you are using these days. Find out how much you would have used in 1980 and see what it would be like to live on that energy budget. Remember, this was the time of the second oil shock. Ask your parents or their peers about how they had to adjust to those circumstances.
Maybe you won't be amazed by the things you can still do using less of these several forms of energy.
Then figure out how much energy you
want to consume (1980 or 2010 or whenever), and how you would power that way of life without using any oil.
The charts on this DOE page (
http://www.eia.doe.gov/aer/txt/ptb0103.html ) and this Wikipedia page (
http://en.wikipedia.org/wiki/Energy_in_the_United_States ) will help you figure all that out. (I'm assuming you live in the U.S.) Population data is available from the US Census.
http://www.census.gov/population/www/censusdata/hiscendata.html But also keep in mind that there are regional and state differences. For example, more coal is used for electrical generation in Texas than in New England, which uses more natural gas.
That Wikipedia article is a good place to start reading about what sectors of the economy rely on which forms of energy. You will see that electronics make up a small proportion of consumption, and very little electrical production comes from oil. This is why I think that society will adjust to oil shortages in sectors that use a lot of petroleum well before we turn off the Internet.
But with renewable energy you have problems with intermittent and EROEI. How will they ever scale up?
Regarding intermittence, as I mentioned you can send electricity around the world to fill in the demand. Long-distance DC lines are being experimented with. George Monbiot wrote about this in
Heat, as well as innovative storage methods. There was also a
Scientific American cover story about renewable energy options pretty recently. (I'm sorry I can't remember which issue.)
As for EROEI, maybe for now we make wind turbines in factories electrified by burning coal. Thirty years from now we'll make wind turbines in factories electrified by wind turbines and tidal generators and all the other wedges of the electrical pie.
What do you feel about nuclear energy?
I dislike it. But I expect that I will lose that fight. Demand for non-fossil-fueled electrical production, new kinds of small reactors, and national politics will bring it back. Hopefully, we'll figure out how to deal with the waste later.
Regarding the timeframe:
Well, I figure it would go along the lines of when oil becomes too expensive, industrial civilization begins to contract, resource wars become common, a mass starvation die off occurs, and we either see a peaceful transition to Green Wizardy ... or brutal feudalistic agrarian societies.
A good start. That's a timeline, a sequence of events. But you should also consider the
timing, the speed associated with that sequence, the
frame of years. How quickly do you think your sequence would unfold? You can even put dates on it as part of a thought experiment. And we can examine the details if you'd like.
I don't think the other side of Hubbert's Peak is a cliff, but rather a step-like slope. Even if oil use declined twice as fast as it it rose, and assuming we peak right this minute, we won't get to zero until the Eighties. I think that we'll be mostly off of oil before that.
Higher prices and price instability will force us to change, and the trials of new systems in the Teens will show us the winning and losing generating methods for different environments. With that stick and those proven carrots, I think you'll start seeing everyone jump on the renewable bandwagon in the Twenties. Most of the infrastructure will turn over in the period 2020 through 2050.