Which of the following is not an alternative to fossil fuels?

Gasoline is a conventional fossil fuel, derived from petroleum, and is widely used for powering internal combustion engines in vehicles. It contributes to greenhouse gas emissions and environmental degradation, which is why transitioning to alternative energy sources is essential for reducing reliance on fossil fuels.

On the other hand, compressed air, electricity, and fuel cells all represent alternatives to fossil fuels. Compressed air can be used to power engines that convert stored air energy into kinetic energy, while electricity can be harnessed from renewable sources like solar or wind power to charge electric vehicles. Fuel cells convert chemical energy from hydrogen into electricity, which can also be generated using renewable resources.

This distinction highlights why gasoline stands out as a non-alternative to fossil fuels, as it is a primary contributor to the fossil fuel economy.