NOVELTY - Producing hydrocarbons from ambient carbon dioxide, comprises: extracting carbon dioxide from a gaseous source using a sorbent (e.g. sodium hydroxide); utilizing e.g. wind power and solar power to regenerate sorbent by membrane cell electrolysis or other similar method, simultaneously producing hydrogen gas; releasing carbon dioxide from sorbent; and utilizing e.g. Fischer Tropsch process and Mobil process to convert carbon oxides to hydrocarbon concomitantly with or after effecting reverse water-gas shift reaction to convert carbon dioxide and hydrogen gas into carbon monoxide.    USE - The method is useful for producing hydrocarbons from ambient carbon dioxide (claimed). The method is useful for: recovering and converting carbon dioxide existing in a gaseous environment, including air, into fuels including gasoline, diesel fuel, jet fuel, heating oil, methanol, ethanol and other organic fuels; reducing carbon dioxide emissions in internal-combustion engines (automobiles) by converting the engines into carbon-neutral systems; and for recycling the carbon dioxide released by burning fuels in e.g. automobiles, trucks, airplanes and heavy equipment which will release an amount of carbon dioxide that is equal to the carbon dioxide.    ADVANTAGE - The method: is environment friendly as it uses renewable energy sources; extracts same amount of carbon dioxide, which is equal to amount of carbon dioxide released by burning of fuels; is more effective in converting any arbitrary fleet of carbon dioxide-producing engines into a carbon-neutral system, without re-engineering the existing fleet and thus cost-effective; and is relying on domestic renewable resources e.g. wind and solar power, hence the method has the potential to replace imported fossil hydrocarbons with domestic, synthetically produced, renewable hydrocarbons, reducing or eliminating the reliance of the US on foreign imported oil.    DETAILED DESCRIPTION - Producing hydrocarbons from ambient carbon dioxide, comprises: (i) extracting carbon dioxide from a gaseous source using a sorbent including sodium hydroxide, calcium hydroxide or potassium hydroxide; (ii) utilizing wind power, solar power or other renewable energy sources to regenerate the sorbent by membrane cell electrolysis or other similar method, simultaneously producing hydrogen (H2) gas; (iii) releasing carbon dioxide from the sorbent; and (iv) utilizing the Fischer Tropsch process, Mobil process, Imperial chemical industries (ICI) process or related or similar processes to convert carbon oxides to a hydrocarbon concomitantly with or after effecting the reverse water-gas shift reaction to convert the carbon dioxide and hydrogen gas into carbon monoxide for reaction in the Fischer Tropsch process, Mobil process or ICI process. An INDEPENDENT CLAIM is also included for a method of converting ambient carbon dioxide into a hydrocarbon which comprises absorbing carbon dioxide from air into a sodium hydroxide solution to form sodium carbonate, releasing carbon dioxide from the solution by passing chlorine gas through it to produce aqueous sodium chloride, subjecting the carbon dioxide so released to a reverse shift water gas reaction and reaction with hydrogen to produce a hydrocarbon and subjecting the aqueous sodium chloride to electrolysis to produce sodium hydroxide and chlorine and recycling at least some of the sodium hydroxide and chlorine for reuse in the method.