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In short, with the fiat currency system we have now tomorrow's growth is collateral for today's debt. The entire system has only two modes - growth or collapse - it doesn't work as a steady state.(Ps I don't follow your banking revolution - but my bank manager is revolting - does that help ?)
Now, in practice, economic growth means energy demand growth. Argue all you like about efficiency etc but history says economy up = energy demand up.
The few periods that have occurred where energy demand appears to have fallen (eg oil worldwide in the early 1980's, electricity in Tasmania in the 1990's) were associated with both a stagnating / contracting economy and general economic strife, fuel switching to some other energy source and/or changing the location of energy consumption to outside the area being considered (eg export raw materials instead of manufacturing will lower energy consumption in one area but it keeps rising globally).
If we switched to even 50% renewable electricity then it won't cut emissions. By the time we could implement such a change, growth in non-electricity fuel use (which is well over half the total in most countries anyway) plus electricity demand growth would ensure that total fossil fuel use still went up, not down. Sure, it would be less than it otherwise would have been, but total emissions would keep rising. And of course not even the most hard line people are seriously proposing we go as far as 50% renewable electricity any time soon.
Even John Howard's 25 nuclear reactors wouldn't help. Due solely to demand growth, we'd be using more coal by the time they are built than we do now. And that's with enough reactors to supply our entire present electricity demand (excluding existing hydro) - but it would be less than half of demand by the time they could be built.
So either we go to 100% renewable / nuclear for all energy, or damn close to it, or total fossil fuel use will continue to rise. OR we radically change the banking system to one that doesn't require constant growth.
The only way I can see fossil fuel use actually falling is if:
1. For whatever reason above ground availability of fossil fuels declines. A situation that's happening now with oil but being more than offset by rising coal and gas production. OR
2. We actively force down total fossil fuel use. That means focusing on the acutal total quantity in tonnes, barrels etc and not as a % of total energy use. The latter is a flawed approach (hence not opposed by the fossil fuel industry - a point that says it all really) as previously explained. Given that such a move would, without a move towards total reliance on renewables / nuclear being part of it, collapse the economy it is not likely to happen. OR
3. The present financial system comes to an end and is replaced by one that does not, in practice, involve next year always requiring more energy than this year. That could be either due to a radical change to an alternative system or simply the collapse of the present system and consequent economic strife.
I'd love to see fossil fuels consigned to the history books but I just can't see anything other than constant growth until such time as it either becomes physically impossible (peaking production) or the consequences become so blindingly obvious that we accept whatever happens economically (ie actual collapse of the present banking system) as the lesser of two evils.
Technically, we can go renewable for just about everything. Aviation, petrochemicals and a few industrial processes are the main exceptions (though nitrogen fertilizer can be made from electricity - been done before without much trouble). Everything else we can do with, mostly, electricity. And we know how to go very close to 100% renewable for power generation. Long distance trucks etc can be replaced with trains (worked before). Short distance road vehicles can go electric with some niche use of hydrogen. Ships can go solar / wind / battery.
All technically very possible but simply tinkering around the edges with x% renewable electricity, a bit of insulation on hot water pipes and different light bulbs does little to take us off the constant growth in fossil fuels track.