Gas vs Petrol

Hi @ all I’ve heard of many who have retrofitted their gasoline. A hybrid vehicle with gas and gasoline. What do you think about it? Your opinion would interest me. I think that in a few years we will run out of fuel. Until it is done, you will surely have to take a loan before you go to the petrol station. At the moment the litre of petrol in Wiesbaden stands at €1.23. In contrast, the litre of gas at €0.58. For a long time already cheaper. 2.500,- €. With a driving performance of about 30,000 km / year, a system would count after less than a year. What I want to know now, how is this gas produced? Artificially or from natural resources. If the 2nd should be the case, we would be back at the beginning of the original problem: that then the gas will run out and become too expensive. What do you think about it? MfG Klaus