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Isn't that about the fuel and not the vehicle? If we manufactured diesel out of wood or algae, the same cars would suddenly become very green - in case of alga
by throwaway87915 4y ago
Isn't that about the fuel and not the vehicle?
If we manufactured diesel out of wood or algae, the same cars would suddenly become very green - in case of algae cultivation for fuel, you can reach carbon negativity (the process net-decreased carbon in atmosphere).
This is likely more green than building battery electric vehicles with large capacity. Batteries are great but cars don't need more than 100km of charge. Longer trips should be on bio-diesel or bio-gas.
- Xylakant 4y agoThe process cannot be carbon negative unless you sequester the algae somehow. All the carbon the algae captures while growing will be released when they decompose.
- bratwurst3000 4y agoHmm could be that the way is co2->algea->hydrocarbon->H2 and carbon as a byproduct. Still I dont think its Carbon negativ because they rather make hydrocarbons out of it and the production uses energy plus. Only wanted to state the possibility of Carbon negativ as real.
- throwaway87915 4y agoIt works out carbon negative because pieces of algae fall down to the ocean floor and remain there, as a side effect of algae cultivation. It's a significant number.
- bratwurst3000 4y agoYou are right about biodiesel. Most energydense crops that we grow are used for meat production and generates a shitlod of greenhouse gases on the way. Less meat consumption would mean more crops could be used for biodiesel
- kitkat_new 4y agoand bio diesel production is worse for the climate than fossil diesel, because of the amount of agricultural work that needs to be done
- bratwurst3000 4y agoHmm ok. Do you have sources for that? Their is a certain amount of energy that is needed to process the crop to diesel and also for production. But is it that bad? Even if those energys are provided by biodiesel and renewables?
- nforgerit 4y agoPlus in the context of climate change we'll probably need every square-foot of farm field to actually produce food and not fulfill the wet dreams of every Porsche 911 driver which can be very efficiently dealt with by e-mobility.
- bratwurst3000 4y agoIts not about „wet dreams of a porsche driver“ Its about the transition phase between now and a full electric vehicle fleet. Combustion engine will exist in the next 20-40 years. I am not an expert or sth. If you have links or could expand a bit more on why fossil fuel would be preferable, that would be nice. Thanks