[Info-vax] Intel junk...Kernel-memory-leaking Intel processor design flaw forces Linux, Windows redesign

[Jan-Erik Soderholm]

Den 2018-01-09 kl. 01:13, skrev Wolf K:
> On 2018-01-08 14:59, Jan-Erik Soderholm wrote:
> [...]
>> If you run the gasoline engine on bio-fuels produced from plants
>> growing *today*, there is no issue with the C02 emissions.
> 
> There is a net addition to the CO2 load, because it costs energy (ie, fuel) 
> to produce the biofuel.

If that "fule" is also bio-fule, I see no issue here. I don't expect the
amount of input fuel to be higher than the produced amount...


> That cost can be stated as the proportion of the 
> fuel needed to produce it. That is, how many litres of some fuel does it 
> take to produce 100 litres of the stuff? A few years ago, Scientific 
> American published an article analysing this question. In terms of energy 
> cost/litre, gasoline was the cheapest at less than 10%. Other fuels 
> (diesel, jet, bunker C, etc) were 50% to 10% more expensive. Biofuel was 
> even more expensive. Ethanol costs more energy to produce than it contains.
> 
> In addition, as with all energy produced centrally in wholesale quantities 
> and dispensed locally in retail quantities, there is the energy cost of 
> distribution. Even electricity has a distribution cost: on average, 10% of 
> every kilowatt-hour produced at the generating station has to be allowed 
> for as line loss, transformer loss, etc.
> 
> Ultimately, all costs are energy. Dollar costs don't express energy cost 
> differences very well. "Carbon footprint" is better, but it's still only a 
> rough measure of the energy consumed  by a person or other entity. So the 
> question is, how much of the energy we produce does any actually useful 
> work? Very, very little.
> 
> Consider that in a typical commute by car about 90% of the available energy 
> is used to move the car and its occupant. Since only about 25% to 30% of 
> the fuel's energy is converted into work (the rest is waste heat), that 
> means only about 3% of the energy in the fuel is used to move the driver.
> 

Correct. We must remodel our way of living to a situation with far
less travel in general.


> Modern technologies are extremely wasteful of energy.
>