Earlier quoted context omitted.
You seem to be saying that renewables require improvement just due to the scale of the problem. But once renewables are sufficiently cheap, or once CO2 taxes cause fossil fuels to reflect their true cost, all that's required is just building more of them. This is a matter of scaling up, not improving the product, although improvement will almost certainly also occur, due to experience effects if nothing else. That re…
> seem to be saying that renewables require improvement due to the scale of the problem. Certainly they must be competitive in terms of energy density otherwise how can they substantially displace another energy source? Today renewable tech is not energy dense enough. > Once renewables are sufficiently cheap ..cheap in total lifecycle cost (not end user cost of panel), carbon negative and sufficiently energy dense (t…
We have plenty of examples of humans forgoing technologies that turned out to have downsides. And it's a near universal truth that dire warnings were given about these restrictions, warnings that turned out to be vastly overblown. Technology does step up to the plate when market incentives are in place.
> Look in the graph below at where diesel is relative to a Li-Ion battery.
Li-ion batteries do not have to become as energy dense as diesel for fossil fuels to be displaced. Some applications don't require that energy density. We are already seeing battery electric buses, for example. In other cases something other than batteries can be used, for example hydrogen. In the worst case, net zero CO2 diesel can be made synthetically, using energy from renewables (and carbon from either CO2 capture or biomass; use of biomass would be limited to these edge cases.)
We are already at the point technically where a great deal of fossil fuel for transportation would be displaced if transport paid the true cost of CO2 emission.
> Fundamentally, for your position to be true you have to assume a miraculous leap forward in technology.
No, the roadblock is not technology, it's proper carbon pricing. That is the biggest obstacle.