Invention and inventions have been suppressed for profit.

Power is produced from sources other than fossil fuel.suppression has been very effective, mostly from huge government subsidies to keep prices of fossil fuel low enough to be artificially competitive with the suppressed technologies, which do not receive similar subsidies.

I heard that the oil companies suppressed the ability of cars to run on gas, because it was the carburetor that allowed them to run on gas.The soft-drink companies have figured out how to sell water for more than the price of gasoline, so I would have expected that technology would have been resurrected, except that nowadays cars are fuel injected and there is no role for a carburetor.

I think that's right.

This isn't a truly serious answer.Cars can run on water, but first you have to break that water into hydrogen and oxygen.

Many people claim to have invented revolutionary devices that have been suppressed by the government.The devices they describe are based on dubious principles.I don't know of any technology that's been suppressed.

The EV1 electric car was part of the US streetcar system.The decline was most likely due to the depression.