hi, i have learned a lot in your article. but there is a even more interesting solution for transportation. it is called the air car. made by a french ingenieur who since 10 years has been developing it, inicially as taxi for mexico city. now, very soon, they start producing in series. and they will be really really cheap (arround 9500€). the max speed is at about 120km/h at a top range of 150km. on pure compressed air. if you want more, ad 1.8l of gasoline or other fossile or bio fuel for a 100km and reach a max of 1600km or 1000mi. i think that this gives humans for the first time a real option on changing things. read more about the air car and other innovative energy sorces and propulsion methods at http://www.cleanfuture.co.nr

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