Gemini: is there a car that runs on water?

[Sparty]

No, there are no commercially available cars that run solely on water.

There have been claims and ideas about "water-fueled cars" for many years, but these haven't proven to be viable technologies for several reasons:

Laws of Physics: Extracting energy directly from water to power a car violates the laws of thermodynamics. Water (H2O) is a stable molecule, and breaking its bonds to get usable energy requires more energy than you can get out.

Debunked Claims: Some inventions like the "water fuel cell" have been investigated and found to be fraudulent. They rely on unrealistic principles and haven't been replicated successfully.

However, there are some alternative options that might be confused with water-powered cars:

Hydrogen Cars: These use hydrogen gas (H2) as fuel, which can be produced from water through electrolysis (using electricity to split water molecules). However, the car itself doesn't run on water directly.

Water-Based Biofuels: Some vehicles might use biofuels derived from water sources like algae. But these are processed fuels, not water itself.

If you're interested in alternative fuel options for cars, hydrogen and electric vehicles are actively being developed and offer more realistic solutions.