Unfortunatly making a hole for oil and refine it is still the simple way.
Biodiesel like most of the alternative fuels have its downs... crop space, water, even the purification and fraction byproducts...
Even with lemna minor plant in wastewaters we have problems...
All bateries have at large scale production problems with construction resources materials or even time to make them. That's why you only see them in space programs or military...
I like more everyday the simple concept of winding a spring during night and in the morning going to work. Hey, as for pressure or compressed air cars go why not generate the gas pressure along the way chemicaly like mentos and coke??? Ha ha.
Well, peugeot is working on a simple compressed air for regenerative braking. Cheap and effective!
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