Compressed air- powered by sustainable energy sources, is the lowest cost, and most sustainable, option for transportation. Consider that the cost of buying additional solar panels or wave energy convertors is far less than the cost of batteries that need ongoing replacement; at a extremely high cost to the environment.

Once the energy source is established to perpetually recharge the system, the cost to run on compressed air is practically nothing. It costs less to build this infrastructure than gas or electric, lasts longer, and almost eliminates the fire risks associated with fossil fuels and batteries. Compressed air devices can be stored full or empty for long periods without concern for the integrity of the battery or fuel. They can be operated in hazardous environments, including in highly flammable locations or even underwater.

Efficiency: the heat generated during compression supplies thermal energy at nearly twice the efficiency of resistive heating, and can be used to reduce the cost of heating water, air, or stored in a thermal battery (like sand) to efficiency heat a building from solar energy. During expansion of air, heat energy is extracted from the environment and adds measurable potential to the system, replacing most of the energy that was extracted during compression, and provides the potential for compressed air transportation to be over 100% efficient at converting solar energy into usable heat and transportation.