Why Petrol price is high then before?

The thing that alot of people don't seem to realise/think of/know is that there have been cars invented which do not need fuel to run they simply run on AIR, their max output is about 45 miles per hour which is not fast BUT it would be free to the consumer to run and it would also save the environment, now the question is WHY have these cars not been mass produced and made available, the answer to this question MONEY, oil is big business and it is also BIG tax, take the uk for instance our government puts around 55p per litre onto the price of petrol for tax now if there were air powered cars they would loose billions in revenue which they would then turn round to us and say " well we need to find this money from somewhere else then " and that would more than likely be from public services which is not what people want to see. In the uk the government are always going on about saving the planet and doing our bit but all the while they are doing the most harm by with holding inventions like this from the public all so they can keep the billions in revenue it fetchs in, they never seem to think that if they were not spending tax payers money on pointless things, kids for foreigners who do not live in this country etc etc then there would be more money in the coffers so the end result is that the environment suffers and the government make it out to be our faults when in reality they are doing the most harm. It's not fair to blame the people of each country the blame starts and ends with the governments if they withold technology like this back from production then they are making things worse and they are the ones in the wrong.

Its a supply and demand thing, the higher the demand the higher the price. the more supply - lower the price. It's the goverment of each country must have a political will to help our scientist and inventor to make other source of fuel or energy cost effective.