In the US, over 77% comes from fossil fuels including coal, natural gas, petroleum, and others. Plug-in cars are a fad that do more damage than gasoline.
Another fad is bio-ethanol, which is less efficient than gasoline (by far), is nearing the same cost/gallon as gasoline as its demand increases, and is contributing (at least in part) to rising food prices worldwide.
The real answer is hydrogen-powered fuel cells, but they require a MASSIVE overhaul to our infrastructure, which we cannot afford to do all at once, so it will take a very long time to accomplish. Until then, gasoline-hybrid or HCCI are the best answers we have.
Maybe even someday we'll one-up hydrogen fuel cells with small form-factor hydrogen fusion reactors or even proton-antiproton annihilation (antimatter), but those are far-fetched fantasies for at least the next several decades.
“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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Do you realize where that electricity comes from?
In the US, over 77% comes from fossil fuels including coal, natural gas, petroleum, and others. Plug-in cars are a fad that do more damage than gasoline.
Another fad is bio-ethanol, which is less efficient than gasoline (by far), is nearing the same cost/gallon as gasoline as its demand increases, and is contributing (at least in part) to rising food prices worldwide.
The real answer is hydrogen-powered fuel cells, but they require a MASSIVE overhaul to our infrastructure, which we cannot afford to do all at once, so it will take a very long time to accomplish. Until then, gasoline-hybrid or HCCI are the best answers we have.
Maybe even someday we'll one-up hydrogen fuel cells with small form-factor hydrogen fusion reactors or even proton-antiproton annihilation (antimatter), but those are far-fetched fantasies for at least the next several decades.