Elec wrote:[...] The energy balance of the HVP sector is less mediocre than that of the biodiesel sector, it is true. But we remain in very low yields, 0,2 to 0,5%. [...]
So what ?
It is the fact of using the HVP which does not allow to transform more than 0.5% of the light which arrives at the ground into energy which allows you to say that "
Agrofuels (whatever the sector) have a disastrous environmental and health impact, and they are very expensive."
Elec wrote:[...] My opinion: to have recourse to the biofuels (HVP or not) does not really have anything of ecological. And to use on a small scale with the HVP to run its car is an approach of resourcefulness, but it does not has nothing to do with ecology. [...]
Ah good ... And what is ecology for Professor Elec?
Once again, you have a far too binary vision of things (where does that come from?) ...
Ecology first of all, if we refer to semantics, it is science which studies the interactions between living beings.
Then, in the sense in which it is currently understood, ie "
have a behavior as a human being that has the least possible impact on the environment that allows this species to envisage a future that is not too complicated", I do not see why all the gestures would not be good to take!
Where do you get that an effort is not interesting in the overall balance if it is not applicable to all?
How can you say that using a fuel locally that greatly limits CO2 emissions is not a gesture that reduces the impact of our activities on the environment?
Elec wrote:[The efficiency of converting solar energy into biomass is very poor, the efficiency of the heat engine where the oil is also burnt etc.
It is very dangerous today to make people believe that agrofuels are an ecological solution. This is what pseudo-ecologists do, either out of ignorance or for commercial reasons (farmers looking for outlets for their productions).
Let's get on well: I have nothing against the electric car, I am even very favorable to it, especially in its series hybrid version!
But it is not because you have blinders which allow you to see only one solution, that it is indeed the only one worthy of interest!
Certain agrofuels made from corn or wheat in particular, or the oil palm from Indonesia are indeed a heresy, but that does not mean that the baby should be thrown out with the bathwater!
Recovering part of the solar energy and turning the Carbon on a short cycle through the photosynthesis of plants constitutes
one of the solutions to the necessary energy consumption of human societies.
It is not the only one, it is perhaps not the one which presents the best overall environmental record but in any case, it has the merit of existing today and of not requiring waiting for "new technologies" to be able to be used now, for a small part of the overall energy mix.